A man who was almost robbed is under arrest himself for chasing down the suspects and ramming their car.
Wednesday morning, a man living along La Jolla in Stockton saw men come to his home to steal an engine block.
The man, Ramon Cueva, came outside and the suspects took off.
Police say Cueva chased them, cutting them off at one point. He then yelled at the suspects.
Investigators say Cueva got back behind the wheel, and rammed the suspects with his car.
Police arrested Cueva for assault with a deadly weapon.