An off-duty Dallas police officer was arrested Sunday in Mesquite after authorities say he drove along Interstate 30, fired at a car with his handgun and continued to drive on the highway with the weapon held out his window, Mesquite police said Sunday.

No one was injured in the incident that occurred about 2:40 a.m. Sunday.

Read more here: http://www.star-telegram.com/2012/04/29/3920830/off-duty-dallas-police-o...