From the AP: A study has found that nearly three out of four Massachusetts police departments engaged in racial profiling of minority drivers, prompting the state to launch a probe. The Northeastern University study, released Tuesday, was commissioned four years ago by the Legislature and included 366 departments -- from cities and towns and the state police, to university, state transit and Amtrak police agencies. Just 92 got a passing grade. Still waiting for word from the state's junior Senator...