By KAREN PATTERSON
The Dallas Morning News

A good moth­er swad­dles her child in a stur­dy weave of love and care. But moth­ers with severe men­tal ill­ness might offer only a threadbare cover.

Frayed by psy­chosis or a pro­found depres­sion, the fab­ric of these moth­ers’ minds can, in rare instances, leave their babes dan­ger­ous­ly exposed. Such women often strug­gle might­i­ly to be good moth­ers, research sug­gests. And in many ways, they would suc­ceed — if they did­n’t kill their children.

Motherhood is con­sid­ered a sacred duty. So last June, when Andrea Pia Yates drowned lit­tle Noah, John, Paul, Luke and Mary, peo­ple won­dered exact­ly what evil had possessed her.

For any indi­vid­ual, sci­ence can’t answer that ques­tion. But sci­en­tif­ic stud­ies can help define dif­fer­ences among moth­ers who kill. In fact, research dat­ing back three decades has out­lined sev­er­al cat­e­gories of such moth­ers, with some overlap.

Women who kill their chil­dren as a group are going to be just as dis­parate as any oth­er pop­u­la­tion,” says Carol Holden, a foren­sic psy­chol­o­gist and researcher at the University of Michigan.

Some moth­ers fatal­ly beat their chil­dren but don’t mean to kill them. Mothers also kill to spare a child some real or imag­ined suf­fer­ing. They kill for revenge on their part­ners. They kill chil­dren they no longer want — or did­n’t want to begin with.

You have every­one from a ter­ri­fied 13-year-old who does­n’t even real­ize she’s going to give birth and does­n’t know what to do and smoth­ers the new­born, to some­one who cold-heart­ed­ly decides chil­dren are too much trou­ble,” Dr. Holden says.

Mothers also kill because their minds have wrung real­i­ty into a bizarre new form. Such killings, and the women who com­mit them, tend to be dis­tinct from the oth­ers, psy­cho­log­i­cal studies show.

Overall, these men­tal­ly ill moth­ers … look quite dif­fer­ent than the non-men­tal­ly ill moth­ers,” Dr. Holden says. On the oth­er hand, that’s not to say that any­one who looks like that is def­i­nite­ly mentally ill.”

Statistics on child mur­ders in the United States show just how vul­ner­a­ble the youngest chil­dren are. Among preschool­ers, the younger the child, the greater the risk of being a homicide victim.

Victims of fil­i­cide — the term used when a par­ent kills a child — also tend to be very young. Of the U.S. chil­dren in one mater­nal fil­i­cide study, we did­n’t find a sin­gle child killed … who was over age 12, and almost all of them — 85 per­cent — were under age 5,” says foren­sic psy­chol­o­gist Geoffrey McKee.

Matching threads weave through much of the research on fil­i­ci­dal moth­ers. Compared with oth­er such moth­ers, those who are severe­ly dis­turbed are more like­ly to be old­er. They are more like­ly to be mar­ried. They tend not to con­ceal their act. They more often try to kill them­selves at the same time. And they are more like­ly than oth­er such moth­ers — who kill dur­ing abuse or moments after child­birth — to mur­der more than one child.

Such threads con­nect even moth­ers of dif­fer­ent nations — at least in some English-speak­ing cul­tures, says Dr. McKee, a clin­i­cal pro­fes­sor at the University of South Carolina School of Medicine. He and col­league Steven Shea have com­pared 20 U.S. women accused of killing their chil­dren with ear­li­er stud­ies of such women from Britain, Canada and a multinational sample.

The women in the U.S. group had been referred to a psy­chi­atric hos­pi­tal for pre­tri­al eval­u­a­tion, and thus were more like­ly to be men­tal­ly ill than, say, the broad­er group of women in the English study. Still, the research not­ed a con­sis­ten­cy of char­ac­ter­is­tics across countries.”

The cross-cul­tur­al com­par­i­son sug­gests that women who kill their chil­dren typ­i­cal­ly are non­ad­dict­ed, mar­ried, low-income, men­tal­ly ill, new or recent moth­ers under 30 who, act­ing alone and with­out weapons, kill only one of their chil­dren, like­ly of preschool age,” the scientists wrote.

In our study, only 15 per­cent had more than one vic­tim,” Dr. McKee says. However, when there is more than one child who’s killed, typ­i­cal­ly all the chil­dren are killed.”

In his clin­i­cal and research expe­ri­ence, he adds, if there are mul­ti­ple chil­dren who die, the moth­er is mentally ill.”

Dr. Holden and her col­leagues have detect­ed sim­i­lar strands. They stud­ied 28 Michigan women who had pur­sued the insan­i­ty defense for killing their chil­dren. Eight of the women had been held crim­i­nal­ly respon­si­ble for their killings; 20 had been found not guilty by rea­son of insan­i­ty. Those in the lat­ter group were more like­ly to have had a his­to­ry of psy­chi­atric ill­ness, and less like­ly to have held a job — which is a good mea­sure of … adjust­ment” psy­cho­log­i­cal­ly, Dr. Holden notes.

Among those found not guilty by rea­son of insan­i­ty, 60 per­cent had been diag­nosed with schiz­o­phre­nia (a brain dis­or­der char­ac­ter­ized by strange think­ing, feel­ings and behav­ior) and 35 per­cent with a mood dis­or­der — most often severe depres­sion with psychotic symptoms.

A his­to­ry of sui­cide attempts, psy­chi­atric hos­pi­tal­iza­tions and being abused is not uncom­mon. When we’re talk­ing about men­tal­ly ill moth­ers, we’re talk­ing not just of psy­chot­ic moth­ers,” Dr. McKee says, but also moth­ers with a his­to­ry of major depres­sion or clinical depression.

Severity of ill­ness is a cru­cial dis­tinc­tion, notes Dr. Josephine Stanton, a New Zealand clin­i­cal psy­chi­a­trist. Dr. Stanton and col­leagues have con­duct­ed detailed inter­views with six men­tal­ly ill moth­ers who killed their chil­dren. Most of her sub­jects had schiz­o­phre­nia or schizo-affec­tive dis­or­der (schiz­o­phre­nia symp­toms accom­pa­nied by a major depres­sion or man­ic episode). One had major depres­sion and anxiety.

Thirty per­cent of peo­ple have some sort of men­tal dis­or­der, Dr. Stanton says, but ill­ness that severe occurs in only about 1 per­cent. So we’re not talk­ing about some­one with a mild depression.”

Scientists are instead talk­ing about some­one who prob­a­bly has hal­lu­ci­na­tions (imag­i­nary sen­so­ry per­cep­tions) or delu­sions (false, irra­tional beliefs). Among women acquit­ted for rea­sons of insan­i­ty in Dr. Holden’s study, hal­lu­ci­na­tions and delu­sions were common.

The delu­sions includ­ed such notions as the child was defec­tive or mon­strous, pos­sessed by Satan — some­thing is seri­ous­ly wrong with them,” Dr. Holden says. Or there was some sort of delu­sion­al dis­as­ter that was going to befall the chil­dren, and the moth­ers were saving them.”

For the moth­ers hob­bled by depres­sion and psy­chosis, she says, the delu­sions were very much in line with depres­sion — these hor­ri­ble sens­es of what was going to happen.”

The moth­ers Dr. Stanton stud­ied also had stitched crazy quilts of false ideas. For one set of moth­ers, wild fan­ta­sy gov­erned deci­sion-mak­ing. One woman had per­se­cu­to­ry delu­sions where a whole group of peo­ple were run­ning her life,” Dr. Stanton says. According to her delu­sions she had to do all sorts of things to save the world, and she could­n’t.” She also could­n’t leave her child behind.

For the oth­er moth­ers, life was absolute­ly ter­ri­ble and they could­n’t leave their chil­dren in such an awful world,” Dr. Stanton says. It’s not bizarre, but the inten­si­ty of it is delusional.”

Suicidal moth­ers may decide to kill so their chil­dren won’t have to grow up with­out a moth­er, Dr. McKee says. Psychotic moth­ers may be try­ing to save a child from a life­time of psychosis.

So they have a very altru­is­tic rea­son for killing their child, even though it’s pure delu­sion,” he says. In their minds, they are good mothers.

And by some mea­sures, they can be good mothers.

Most are women who real­ly care a lot about being moth­ers,” Dr. Stanton, of the University of Auckland, found. It’s very impor­tant to them … and I think that’s part­ly why, when they devel­op the ill­ness, the delu­sion­al stuff tends to relate to their children.”

Some of the women showed Dr. Stanton pic­tures of their chil­dren and talked of them lov­ing­ly. One of the moth­ers spoke of feel­ing guilty because she had cart­ed her daugh­ter around shop­ping. Another described minc­ing steak her­self, rather than buy­ing mince that would have con­tained ingre­di­ents oth­er than beef.

They would take a lot of trou­ble to make sure things were done real­ly well,” says Dr. Stanton. I think in some ways that increased the bur­den of par­ent­ing for them; it was hard­er because they thought they had to be perfect.”

Other bur­dens can con­sume any­one with a grave mental illness.

Certainly for the moth­ers who are psy­chot­ic, says Dr. McKee, men­tal dis­tor­tions dis­rupt sleep and intrude on the abil­i­ty to think.

Delusions and hal­lu­ci­na­tions are very emo­tion­al­ly drain­ing, espe­cial­ly if these are new-onset symp­toms” — such as those that, in rare cas­es, arise just after child­birth. For some, the symp­toms per­sist, evolv­ing into a more chron­ic psy­chosis, such as schizophrenia.

Some women expe­ri­ence severe depres­sion after the birth of one child but not anoth­er, Dr. Holden says. Others suf­fer depres­sion or psy­chosis after each child is born. The bio­log­i­cal swing that can fol­low child­birth could cause any­thing from a mild case of the blues in a num­ber of women, to seri­ous depres­sion in a small­er group, and psy­chosis in a fraction.

Many recent moth­ers who devel­op men­tal prob­lems aren’t sure how to mend their minds. There are lots of women who don’t seek treat­ment,” Dr. Holden says, because they get told every­body gets the blues.”

Meanwhile, rou­tine pres­sures mount. Someone who’s been men­tal­ly ill for a while is going to have the dif­fi­cul­ties that go along with men­tal ill­ness — impaired social and work rela­tion­ships,” Dr. Holden says. It’s hard to relate to peo­ple whose real­i­ty is dis­tort­ed, adds Dr. Stanton, because their behav­ior can be so odd. They’re quite dif­fi­cult to get close to.”

Each indi­vid­ual case of fil­i­cide, how­ev­er, is not cut from the same cloth. That’s part of the rea­son why … [sci­en­tists] are look­ing for com­mon­al­i­ties,” Dr. Holden says.

Among the moth­ers with severe men­tal ill­ness, the deci­sion to kill a child can arise abrupt­ly. But then, so can the mental problems.

In Dr. Stanton’s inter­views, some women, draped with depres­sion, had con­tem­plat­ed the killing for per­haps a week. For the oth­ers, blan­ket­ed in psy­chosis, the mur­der was an impulse.

But some­thing had definitely snapped.

They all had either a new ill­ness that nobody knew about … or their ill­ness changed,” Dr. Stanton says. When you lis­ten to these sto­ries you can hear that they had signs and symp­toms of ill­ness, but they had­n’t been recognized.”

Among the symp­toms: Thought becomes dis­or­ga­nized. Emotions may dis­ap­pear — or esca­late irra­tional­ly. Impulses are hard to con­trol. Consequences aren’t clear.

It makes peo­ple in that state very, very dif­fi­cult to relate to and to have an idea of what’s going on,” Dr. Stanton says.

Despite the errat­ic nature of the ill­ness­es, her research team was sur­prised at the moth­ers’ lack of pre­med­i­ta­tion. Especially among the psy­chot­ic women, she says, the killing was more the result of disorganized thinking.

I think that’s the real­i­ty of the risk,” she says. When you have some­one who’s active­ly psy­chot­ic, they can do anything.”

After the moth­er’s arrest, treat­ment begins in earnest. And a tapes­try of real­iza­tion, despair and agony unfolds.

For the psy­chot­ic moth­ers, as delu­sions and hal­lu­ci­na­tions are tamed, a deep and last­ing depres­sion can ensue — one that stems from both the declin­ing symp­toms and a grow­ing grasp of the hor­ror of the crime, Dr. McKee says.

Remorse is great and sui­cide is a risk. When the psy­chot­ic rea­son­ing sub­sides, Dr. Holden says, they’re left with the fact that they killed their children.”

Furthermore, says Dr. McKee, often they’re not viewed very sym­pa­thet­i­cal­ly by oth­ers. … I’ve found few moth­ers or fathers who have much sym­pa­thy for a moth­er who kills her children.”

Experts are work­ing to fig­ure out just which moth­ers might some­day kill their chil­dren — and how to get their men­tal illness treated.

Disturbed moth­ers may be con­tem­plat­ing killing them­selves, says Dr. Stanton, but sui­cide ideation is com­mon — and killing chil­dren is uncom­mon. That’s one of the rea­sons it’s so dif­fi­cult to do prevention.”

And since the crime is rare, sci­ence can’t real­ly fore­cast which ill moth­ers might mur­der their child, Dr. Holden notes.

Because the few hun­dred U.S. fil­i­cides each year are spread across 50 states, just gath­er­ing sub­jects for a study can take a decade, Dr. McKee says. During that time, there may be changes in how diag­noses are made or how cas­es are prosecuted.

In addi­tion, stud­ies fre­quent­ly focus on fil­i­ci­dal moth­ers who are men­tal­ly ill because those women are con­cen­trat­ed in psy­chi­atric hos­pi­tals where researchers work. Other fil­i­ci­dal moth­ers, in jail or else­where, are a loos­er-knit group. Yet stop­ping fatal child abuse, and pre­vent­ing over­wrought teens from smoth­er­ing their new­borns, could save more lives.

Still, men­tal­ly ill moth­ers often can’t keep their trou­bles under wraps, pro­vid­ing some chance for prevention.

Dr. McKee cites a report that up to 75 per­cent of moth­ers who mur­dered their chil­dren had psy­chi­atric symp­toms before the killing, and up to 40 per­cent had been seen by a psy­chi­a­trist short­ly before the killing.

If a woman with chil­dren presents with depres­sion, and with sui­ci­dal ideation, a ques­tion clin­i­cians want to ask this per­son is, What are your plans for the chil­dren?’ ” he says.

The ques­tion, orig­i­nal­ly posed by anoth­er researcher, allows the women to dis­cuss their feel­ings about the chil­dren in rela­tion to the sui­cide — and per­haps allows them to talk about unthink­able top­ics, like killing your children.”

Watching for post­par­tum men­tal prob­lems — those that fol­low child­birth — also deserves more empha­sis, Dr. McKee says. He cites sta­tis­tics show­ing that hos­pi­tal­iza­tion for psy­chosis is 25 times high­er among women in the first 30 days and 14 times high­er in the first 90 days after childbirth.

Getting help for moth­ers before their minds unrav­el is not easy. In Dr. Stanton’s inter­views, a num­ber of these women talked about peo­ple in their lives wor­ry­ing about them, but the peo­ple did­n’t quite know what to do with them,” she says.

Doctors and oth­ers need to work hard­er. Sometimes I think it’s actu­al­ly easy to get help to the peo­ple who are quite func­tion­al and who are able to ask and get help,” Dr. Stanton says. We need to be more assertive about fol­low­ing up the peo­ple who need more help but don’t reach out.”

Maternal fil­i­cide has vic­tims oth­er than the slain chil­dren. The fam­i­ly that remains is shattered.

Take the sib­lings who sur­vive. Researchers know lit­tle about them, Dr. McKee says.

You can imag­ine the con­flicts that they would have,” he says. Rage. Depression. Relief. Guilt. They may have wit­nessed the slay­ing. And they may miss mom.

The moth­ers them­selves wear a man­tle of guilt and grief for years. When I inter­viewed these women,” Dr. Stanton recalls, it was just so painful, still incred­i­bly painful for them. It’s a ter­ri­ble thing to have to live with.”