LOS ANGELES (AP) — Police have linked three July stabbings of homeless people in the Los Angeles area to one suspect who left typewritten “death warrant” notes at each crime scene.

The third signed letter was found at a stabbing early Thursday morning in Hollywood and was similar to letters found at two previous stabbings in downtown and Santa Monica, Police Cmdr. Andrew Smith said. Police are asking for the public’s help in finding a person of interest.