Earl Albert Moore/fbi photo

The FBI on Sunday stepped up its nationwide hunt for a 65-year-old, tattooed man suspected of  placing a crude bomb at  the Southeast Plaza Mall in Jefferson County, Colo. last Wednesday. The bomb never detonated.

The Denver Joint Terrorism Task Force released five additional photographs of suspect Earl Albert Moore, who the FBI described as being 200-225 lbs, 6’0” – 6’2”, gray mustache and multiple tattoos.

The FBI requested that he media distribute the new photos.

Authorities found a pipe bomb and two propane tanks in the stairwell of  the mall.

The Denver Post reported that Moore had been released from prison a week before the incident. He was serving time for bank robbery.

The bomb was planted on the anniversary of the Columbine High School shootings.