Arlington Police Fire Officer Who Killed Unarmed Football Player Christian Taylor

— -- Police in Arlington, Texas, have fired the officer who shot and killed an unarmed football player in Texas and the cop now faces a criminal investigation, according to the department's chief.

Officer Brad Miller exercised "inappropriate judgment" and was also cited for "failing to communicate with his fellow officers" and "creating an environment of cascading circumstances," in the death of Christian Taylor, 19, according to Police Chief Will Johnson.

Miller now faces a criminal investigation by the Tarrant County District Attorney, police said.

Taylor, who played for Angelo State University, was accused of driving his SUV through the windows of a car dealership last Saturday.

Police say he did not comply with orders to surrender and was shot.

Johnson earlier said that Miller fired his weapon four times after an altercation.

The death has been ruled a homicide.

Get real-time updates as this story unfolds. To start, just "star" this story in ABC News' phone app. Download ABC News for iPhone here or ABC News for Android here.