A gun-wielding career criminal opened fire at random cars driving down a Massachusetts roadway on Monday before he was shot by responding officers, according to authorities and reports. The gunman was seen in witness video firing shots indiscriminately from a rifle and erratically banging his weapon against a car as he walked down Memorial Drive in Cambridge around 1:30 p.m., CBS Boston reported. A gun-wielding career criminal was shot multiple times after he opened fire at random cars driving down Memorial Drive in Cambridge around 1:30 p.m. Witness Video/CBS A Massachusetts State Police trooper arrived and quickly engaged with the man, identified by Boston 25 News as Tyler Brown, before shooting him multiple times, the outlet reported. Cops confirmed to the outlet that EMS responded to the scene and treated at least one person for gunshot injuries, but did not specify whether it was the gunman.…