Law enforcement sources tell TMZ ... Dawn DaLuise was interviewed by cops after she was arrested for allegedly attempting to hire a member of the Detroit Lions to kill the owner of a rival skin shop. During the interrogation she sang like a canary.
Our sources say Dawn told cops she was being harassed online by a man named Edward Feinstein -- who she claims posted several fake online personal ads under her name.
According to sources ... Dawn told cops Feinstein"s roommate was none other than Nick Prugo-- and said he recently violated parole by traveling out of state without permission.