Credit: Nikki Nelson/WENN.com Photo: Johnny Lewis and Katy Perry

The Los Angeles Police Department is still trying to piece together the events that led to the deaths of an 81-year-old woman and her tenant, Johnny Lewis — an ex of Katy Perry.

Johnny Lewis had been an actor in Hollywood since 2000, with significant roles on The O.C. (as Dennis “Chili” Childress), Sons of Anarchy (as Kip “Half Sack” Epps), and a handful of movies.

He also dated pop star Katy Perry from 2005 to 2006, during his O.C. gig.

Recently, however, he’d been renting a room from 81-year-old Katherine Chabot Davis in Los Angeles. And, according to TMZ, cops believe Johnny was high on either PCP or methamphetamine around the time of the incident.

Johnny is believed to have beat the woman to death before fighting off two men with a wooden plank and “super-human strength,” climbing onto a roof, and falling to his death. His body was discovered yesterday morning (September 26).

Neighbors in the Los Feliz area describe Johnny as “a nice guy.”

Sources: TMZ, Daily News