If you look at this video from FOX45 Baltimore, they sloppily edit and misquote a woman who has been active in protesting police brutality. The anchor says, "We won't stop/we can't stop/so kill a cop."
They appear to be pointing their camera at this YouTube video, around 0:32:
You can clearly hear that the woman is saying, "We won't stop/we can't stop/'til killer cops/are in cell blocks."
Anyway, this is journalistic malfeasance. I won't speculate on why they chose to do this, but I'll let you guess. And if this is the sort of thing that they think they can get away with when there's contrary evidence on video, imagine the sort of nonsense they're feeding you otherwise.