HOUSTON (AP) — Houston police have released new surveillance video of a suspect in the killing of a cardiologist who once treated former President George H.W. Bush.

The city's Police Chief Art Acevedo said last week there's a "high probability" Dr. Mark Hausknecht was targeted when he was fatally shot while riding a bicycle to work earlier this month.

Authorities say the shooter rode past Hausknecht before turning around and firing.