A journalist and advocate who rose from homelessness and addiction to serve as a spokesperson for Philadelphia’s most vulnerable was shot and killed at his home early Monday, police said.

Josh Kruger, 39, was shot seven times at about 1:30 a.m. and collapsed in the street after seeking help, police said. He was pronounced dead at a hospital a short time later. Police believe the door to his Point Breeze home was unlocked or the shooter knew how to get in, The Philadelphia Inquirer reported. No arrests have been made and no weapons have been recovered, they said.

Authorities haven’t spoken publicly about the circumstances surrounding the killing.