A Dallas police officer was placed on leave Thursday over a traffic stop involving an NFL player whom he kept in a hospital parking lot and threatened to arrest while his mother-in-law died inside the building.

Officer Robert Powell also drew his gun during the March 18 incident involving Houston Texans running back Ryan Moats in the Dallas suburb of Plano, police said.

Dallas Police Chief David Kunkle apologized to the family and announced that Powell would be on paid leave pending an internal investigation.

Officer Robert Powell, a three-year member of the force, stopped Moats' SUV outside Baylor Regional Medical Center at Plano after Moats rolled through a red light.

Police officials said Powell told his commanders he believed he was doing his job, and that he drew his gun but did not point it. Kunkle said Powell was not necessarily acting improperly when he pulled his weapon out, but that once he realized what was happening should have put the gun back, apologized and offered to help the family in any way.

Ryan Moats' wife, who was in the car along with other relatives, said Powell pointed his weapon at her.

The Ryan Moats family did not immediately return messages left by The Associated Press. Powell did not respond to requests for comment through the Dallas police union.

Video from a dashboard camera inside the officer's vehicle, obtained by Dallas-Fort Worth station WFAA-TV, revealed an intense exchange in which the officer threatened to jail Moats.

He ordered Tamishia Moats, 27, to get back in the SUV, but after pausing for a few seconds, she and another woman rushed into the hospital. She was by the side of her mother, 45-year-old Jonetta Collinsworth, when she died a short time later from *** cancer.

Ryan Moats explained that he waited until there was no traffic before proceeding through the red light. When Powell asked for proof of insurance, Moats grew more agitated and told the officer to go find it.

By the time the 26-year-old NFL player received a ticket and a lecture from Powell, about 13 minutes had passed. When he and Collinsworth's father entered the hospital, they learned Collinsworth was dead.

The Moats family, who are black, said they can't help but think that race might have played a part in the white officer's behavior.

When the exchange was at its most contentious, Powell said he could tow Moats' SUV if he didn't have insurance and that he could arrest him for fleeing because he didn't immediately stop when Powell turned on his sirens. The pursuit lasted a little more than a minute.

The ticket issued to Moats was dismissed, Dallas police spokesman Lt. Andy Harvey said.

Moats, a third-round draft choice of the Philadelphia Eagles in 2005 out of Louisiana Tech, was cut by the Eagles in August and later signed with the Texans. In three seasons as a backup, he's rushed for 441 yards and scored four touchdowns.