Frank, Penseyres and others in “The Judge”

A controller. Someone calling the shots. Out of caution or distaste, he's chosen to avoid direct action. Now he's found himself a new surrogate.

Someone to carry on the killing.

Someone predisposed to an alternative theory of justice. Disillusioned, credulous, naïve...

You mean we're looking for two guys now?

The killer's capable of a high level of violence, probably someone who's been in the justice system once or twice, done time.

Ex-con, moves in similar circles outside. Limited number of places these people go. Limited ways they socialize.

I think I know the kind of places you mean.