up. first to casey stegall. casey? >> houston police say they know who killed one of the city's constables over the weekend, this is a big development. they say they're closing in on him. first, more on the back story. it was early sunday morning when corporal charles galloway was initiating a traffic stop in the southwest part of houston when the white toyota avalon that he pulled over came to a stop. authorities say the driver hopped out and opened fire on the constable still inside his vehicle. the driver that was just identified as 51-year-old oscar rosales who fled the scene. now a man hunt is still underway for him. we can tell you that they have recovered the toyota and also arrested two family members charging them with campering with evidence. here's the city's police chief not long ago. listen. >> we have video evidence of him