SANTA CRUZ, Calif. — (AP) — An Air Force sergeant and leader in an elite military security force was armed with homemade bombs, an AR-15 rifle and other weapons and had a desire to harm police when he launched a deadly attack on unsuspecting officers.

Staff Sgt. Steven Carrillo has been arrested on suspicion of fatally shooting a Santa Cruz sheriff’s sergeant and wounding two other officers.

The FBI also is investigating if Carrillo has any links to the shooting death of a federal officer outside the U.S. courthouse in Oakland more than a week ago. Both involved shooters in a van.