From: Pitt
Acne medication was likely causing John Mullarkey's depression and a mental disorder when he killed his Gateway High School girlfriend after she told him it was over, defense witnesses testified Thursday.
Attorney Robert Stewart presented the heart of his defense to an Allegheny County jury, bolstering his claim that Mullarkey, 20, was suffering mental side effects from the drug Accutane when he stabbed cheerleader Demi Cuccia, 16.

"Accutane seems to have a very checkered past with respect to side effects," said Dr. Dan Wagner, a Hampton pharmacologist testifying in court for the first time. He said Accutane played a role in the killing.
"There are warnings about depression, psychosis, and suicide," he said. "I don't think the FDA would (require) that unless there was a problem with the drug."
Wagner, who has a degree in pharmacy from Duquesne University, operates a store, NutriFarmacy, which specializes in natural herbs and supplements.
Testimony from defense psychiatrist Dr. Robert Wettstein offered a glimpse into the moments before Cuccia was stabbed and what he said Mullarkey was thinking. Wettstein has testified on multiple occasions in criminal and civil court.
Wettstein testified Mullarkey told him that Cuccia invited him to her Monroeville home Aug. 15, 2007. When he arrived she gave him a hug and a kiss and then turned angry, telling him she was sick of him.
"He said he felt criticized, castigated, like garbage, like (he) wasn't a person. He said she was sitting on the couch. He kneeled on her, and she punched him," Wettstein said about his jail interview with Mullarkey. "He recalled pulling out the pocket knife but he could not recall stabbing her."