Sacramento police served a search warrant at the home of Kings' backup center Justin Williams Wednesday in an investigation involving a woman who claimed she was drugged and raped by the player, a source close to the investigation said.

The source told News10 Williams' girlfriend is also under investigation for alleged involvement in the assault.

The warrant was served on Williams' home in the 1900 block of Jim Casebolt Way in Sacramento's Natomas area at approximately 6:30 P.M. Wednesday, Sacramento police Sgt. Matt Young confirmed.