Police told NewsChannel 4 that based on the man's injuries, they had no choice but to take her into custody.
“The investigators determined there was enough evidence to make an arrest for assault and battery of domestic abuse, assault with a dangerous weapon and assault in the presence of a child,” Balderrama said.
There's no word yet on what led up to the argument but advocates against domestic violence may have an idea.
“Domestic violence is absolutely caused by the need to have power and control over your victims,” said Senior Director for YWCA's Domestic Violence Victim's Services, Angela Beatty.
If Cox-Brewer returns to the force, it could be a while.
“Ms. Cox is going to be placed on administrative leave until we investigate the case fully and present it to the district attorney's office,” Balderrama said.