Police took a man into custody on Friday as a “person of interest,” but no arrests have been made yet, despite a $20,000 reward. There have been 11 reported attacks since the sniper or snipers began shooting along Interstate-10 on August 29.

Phoenix drivers have been unnerved since then, a situation that prompted four members of a “vigilante” group called Bolt Force to start foot patrols on Wednesday in the hope of finding the culprit. They spent the night walking the neighborhoods, looking for shell casing and spots where a sniper could hide and shoot.

With residents jumpy already, a person tipped off police about the suspicious-looking group, and its leader, Tony Rowley (aka “Bolt”), was detained and questioned.

“The communication error caused resources to be drawn to me instead of the shooter which is bad, and it wasn’t a result of me, it was a result of a breakdown in communication,” Rowley told Fox10 Phoenix.

“I believe our presence at night in the dark can be effective.”

RT