Police tactics in Missouri have been under fire since Michael Brown, an unarmed black teen was shot and killed by police.
A day after a police officer in Ferguson was suspended for threatening protesters with a rifle, Massachusetts Governor Deval Patrick, the state's first black governor weighed in for the first time since Brown's death.
"I'm sick of unarmed, black men being shot by police," Patrick told reporters.
Backlash over law enforcement's use of force at Ferguson protests are fueling questions about whether police need equipment that was designed for the battlefield.
The Senate announced Thursday it will examine the militarization of police.
CNN's Deborah Feyerick has this exclusive OutFront investigation.