Closed — final outcome reached

Landmark 1980s California Postpartum Psychosis Case

👤 Sheryl Lynn Massip 📍 Orange County, California, USA 🗓 1987 ⚖️ Murder (second-degree conviction later set aside)

Case summary

In 1987, Massip killed her 6-week-old son, Michael, by running over him with the family car after what her defense described as weeks of postpartum psychotic symptoms. A jury convicted her of second-degree murder in 1988, but the trial judge took the rare step of setting aside the verdict, reducing the offense to voluntary manslaughter and finding her not guilty by reason of insanity. She was placed in a supervised outpatient mental health treatment program rather than prison, and appellate courts ultimately let that disposition stand. The case is regarded as an early landmark in U.S. courts' recognition of postpartum psychosis.

Mental-health context

Massip's defense presented evidence that she suffered postpartum psychosis with hallucinations and suicidal thoughts in the weeks after her son's birth; the trial judge credited that evidence in setting aside the jury's verdict.

Status / outcome

Judge set aside murder verdict; found not guilty by reason of insanity on reduced charge; outpatient supervised treatment

Sources

This summary is compiled from public reporting. Allegations are not findings of fact, and every accused person is presumed innocent unless and until proven guilty.

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