A police officer ended up with a fractured finger from the struggle, police said.



Gray was arrested after a security officer working at the facility on the 4100 block of West Fullerton Avenue called police at about 4 a.m. Sunday after he spotted the man who had crawled under a truck with a bag and tools, police said.



Arriving officers saw the man underneath the vehicle before the suspect managed to run away.



With police in pursuit, the man ran toward the nearby Metra tracks where he dropped the bag and a battery-powered saw, police said.



Gray jumped off a viaduct about 25 feet to the ground, police said, and then ran under a nearby parked semi-truck trying to hide from police on the 4000 block of West Wrightwood Avenue, police said.



Police watched him and managed to detain him, but the man resisted and during the struggle a police officer sustained a finger fracture, police said.



The facility had previously been robbed in a similar fashion as suspects tried to steal the converters to recover the platinum from inside, police said.