A woman killed by gunfire Saturday in a west Bend apartment and the man arrested in connection with her death were on a first date when she was killed, according to new information from the district attorney’s office.

That man, Alan Peter Porciello, is also known to local law enforcement to suffer from a traumatic brain injury and is prone to “bursts of anger,” Deschutes County District Attorney John Hummel told The Bulletin on Wednesday without elaborating.

“We don’t know why this happened. We don’t know how,” Hummel said. “I can tell you, there’s still a lot more investigating to go.”

At 3:45 p.m. Saturday, police responded to a 911 call from Porciello, a 36-year-old Bend resident. Police arrived at his residence at Cedar West Apartments, 825 NE Watt Way, and found the body of Bend resident Jenny Lynn Cashwell, 37.

Following interviews, Porciello was arrested by Bend Police and taken to the Deschutes County jail.

He was arraigned Monday on charges of first-degree manslaughter and unlawful use of a weapon.

Cashwell and Porciello had connected through the dating website PlentyOfFish and had communicated several times before agreeing to meet in person for the first time Saturday, Hummel said.

On Saturday, Cashwell drove to pick up Porciello at his apartment. They went hiking at Pine Nursery Park Trail before returning to the apartment. That’s when authorities say Porciello shot Cashwell and called 911.

On Wednesday, Hummel said much is still unknown and additional charges could come.

Cashwell had two daughters, 8 and 10. In May, she filed for divorce from her husband, according to the state’s judicial information database. She and her ex were married in Bend in 2004.

— Reporter: 541-383-0325, gandrews@bendbulletin.com