You can't start at the point where ICE had already needlessly and unlawfully performed multiple escalations. You have to look at the entire situation, where those escalations were clear retaliation for the victim exercising her Constitutionally-protected right to protest.

The officer "in front" of the car had previously fucked around and found out about moving vehicles. He was positioned just off the quarter panel, which we can only assume was highly deliberate after the last incident - enough room to not get hit, but close enough to have a pretext to murder this woman.

Regardless of how courts may judge legality (if they're even allowed to), this incident demonstrates a callous disregard for human life that is unacceptable for anybody who carries a gun, never mind supposed public servants.