MEDIA, Pa. (AP) — Testing is under way to determine if a brain tumor contributed to a Pennsylvania ex-convict's shooting rampage that left three people dead before he was killed in a standoff with police.
The Delaware County medical examiner is performing tests on the brain of 51-year-old Mark Geisenheyner, who was killed by police on July 4, two days after shooting five people in neighboring Montgomery County.
Dr. Fredric Hellman tells the Delaware County Daily Times results could take weeks.
Authorities say Geisenheyner was seeking revenge over an insurance scam when he barged into the vacation home of a New York City couple and opened fire. A 2-year-old boy from Massachusetts was among those killed.
An acquaintance tells the newspaper Geisenheyner disclosed the tumor to him about a week before the shootings.
Information from: Delaware County Daily Times, http://www.delcotimes.com