Bike rage?
Hausknecht was riding northbound Friday morning on Main Street at the intersection with Holcombe Boulevard when the gunman passed him, Houston police said. Two blocks later, the shooter turned around on his mountain bike and fired at least twice at Hausknecht, who immediately went down. The gunman fled on his bike, riding north.
Sounds to me like a Dindu who thought he was "disrespected" and went back to settle the score. Dollars to donuts.