OAKLAND, Calif. (AP) – Police say a gun used to kill a Northern California artist as he worked on an anti-violence mural was stolen from a federal agent.

Oakland police spokeswoman Johnna Watson said Wednesday that the weapon was taken from an U.S. Immigration and Customs Enforcement officer. ICE spokesman James Schwab confirmed it was stolen Sept. 13 in San Francisco from a car being used by an agent.

Marquise Holloway has been charged with murder in the Sept. 29 killing of Antonio Ramos, who was working on a mural in a freeway overpass.

It comes after Kate Steinle was shot to death in July along the San Francisco waterfront with a gun stolen from a U.S. Bureau of Land Management ranger. Juan Francisco Lopez-Sanchez has been charged and said he found the weapon.