Dec 31, 2020 Massachusetts Gov. Charlie Baker Nancy Lane BOSTON (AP) â A police accountability bill that creates a civilian-led commission with the power to certify officers, investigate claims of misconduct and revoke the certification of officers for certain violations was signed into law Thursday by Gov. Charlie Baker. The law also bans the use of chokeholds, bars officers from shooting into a fleeing vehicle unless doing so is necessary to prevent imminent harm and limits the use of so called no-knock warrants. It also creates a duty to intervene for police officers when witnessing another officer using force beyond what is necessary or reasonable under the circumstances.