Every known serial killer who had been studied held at least two of those childhood characteristics.

"He is a known killer; and he's carrying two guns, while I am unarmed."

She took him back through, following the assumed path of the known killer.

She was set out to slaughter before the dreaded tribal elders, the oldest known killers in existence.

It makes infinitely more sense to take out the known killer before waging a war on a potential killer.

I had to hire some known killers in order to scare him into talking to me.

If it wasn't, then a known killer might be coming around the dune.

"It's the injustice of known killers being allowed to get away with murder."

I would like to add a third, to wit, the rapid and direct approach of a known killer.

"A known killer is connected to a Swiss bank and one of its principal officers," he murmured.