The Pima County Sheriff’s Office have released a photo of the second suspect in the Saturday shooting that killed six people and left Rep. Gabriel Giffords and 12 others  injured.

Last night, Sheriff Clarence Dupnik said that they believe the second man did not fire a weapon, but may have arrived at the supermarket with suspected gunman Jared Loughner.

The photo appears to be taken from surveillance video footage taken by the store.  The man looks to be in his 40s or 50s, with longish graying hair, wearing blue jeans, a work shirt and a denim jacket.

FBI have now taken over the case.  A news conference with Pima County Sheriff’s Department and FBI director Robert Muller will begin shortly, and we’ll be liveblogging.