A manhunt is underway in Texas after a Houston man shot and killed a deputy who was serving a warrant on him in the parking lot of a Dollar Tree, police said.

A DPS helicopter rushed federal K-9 officer Rocky to the Westbury Animal Hospital after he led authorities to a murder suspect who was hiding in a dumpster. Investigators say the dog's action saved many lives.

During the chaos, law enforcement officers carried the US Marshals K-9 to a Texas DPS helicopter so that it could be rushed to a veterinary hospital for treatment.