Didn't Vicky trigger some time after Fleur's death? By which point the man responsible had already been sent to prison, and had been released/escaped (can't remember off hand which) years previous. May be he was even dead already. But if not, Vicky hunting down that one man and "pulverizing" him would have been a serious mistake due to the following reasons:
1. If he survived, he would likely be cripled and would press criminal charges. That's premeditated assault, assault with a deadly weapon, and probably a few others.
2. More likely then not, he would have died. That would mean the police would get involved. And since the attack was premeditated, it's murder rather then manslaughter. But either way, Vicky is in serious legal trouble and New Wave is getting seriously bad press.
3. Amy hadn't triggered yet, so there would be no such thing as having Amy patch up the victim in order to get away with it.