Medical examiner: Deaths of Mt. Lebanon woman, daughter found dead in South Park ruled murder-suicide

The deaths of a Mt. Lebanon woman and her daughter who were found dead in their car in June has been ruled a murder-suicide.

The Allegheny County Medical Examiner’s Office released the findings late Tuesday into its investigation into the deaths of 43-year-old Serena Guan and her 10-year-old daughter, Abigail Neal.

They were both found dead inside a car at a South Park grove June 7 at about 7:20 p.m.

Both were found to have died from hydrogen sulfide intoxication, according to medical examiner office’s release.

They were located at Diana Grove in South Park after Mt. Lebanon police were contacted by a man asking for a welfare check on the woman and her child.

Guan was involved in divorce proceedings and a custody dispute.

According to Allegheny County Family Court records, Christopher Charles Neal filed for divorce from Guan on March 8. Records show he also filed for child custody.

The docket shows that, on May 28, the court entered an interim order giving Neal custody of Abigail every other weekend and from Wednesdays after school to Thursday mornings.

The custody arrangement was scheduled to begin at 4:30 p.m. the day Guan and her daughter died.

Abigail was enrolled in fourth grade at Howe Elementary School in the Mt. Lebanon School District.