Karen Read supporters are demanding Norfolk County DA Michael Morrissey step down.  His office is prosecuting Read who is accused of killing her boyfriend, Boston Police officer John O'Keefe. 

The lead investigator on the case, who was employed by Morrissey's office, was suspended on account of misconduct while investigating officer O'Keefe's death and Read's involvement. 

A mistrial was declared on account of a hung jury, but Morrissey's office vows to retry the case.