A bullet pierced the side of a tractor-trailer on a Phoenix freeway Thursday, and police said they were treating it as the 11th attack in a string of shootings over the past two weeks that have terrorized drivers.
The governor pleaded for the public’s help earlier Thursday, and authorities said they could be dealing with more than one gunman.
The bullet hole in the semi was reported Thursday morning, and police were checking out at least one other report that could be related, a projectile that damaged the window of a car.
The shootings have drawn comparisons to the sniper attacks that terrorized the Washington, D.C., area in the fall of 2002. Ten people were killed in those shootings, which targeted drivers pumping gas and people out for other ordinary errands.
One gunman, John Allen Muhammad, was executed in 2009, and his accomplice, Lee Boyd Malvo, is serving life without the possibility of parole.
The Phoenix gunman is similarly feeding on terror, said Clint Van Zandt, a former FBI profiler and NBC News analyst.
“He knows the time he wants to be out there. He knows the location,” he said. “He, in his mind, is playing this chess game with the authorities.”
Erin McClam is a senior writer for NBC News, responsible for reporting, writing and editing general news for NBCNews.com. Prior to joining the site in January 2013, McClam worked at The Associated Press, where he spent 13 years and was most recently financial markets editor. In that role, McClam was responsible for a team of five reporters and a deputy editor that covered the stock and bond markets, financial regulation and the nation's largest banks.
Prior to that role, McClam held a variety of jobs at AP, including being a national correspondent and an original member of its Top Stories Desk editing operation.
McClam lives in New York.
Miguel Almaguer is an NBC News correspondent is based in Burbank, California.