Thanks to the doggedness of one of his victim's parents.
Robert Trigg jailed for life for killing two girlfriends
"In a statement in court, Ms Nicholson's elderly mother questioned why she had been able to gather enough evidence to bring the case to court but not police. ... Brandyn McKenna, the youngest son of Ms Devlin, said outside court on Wednesday: "We have always said that it was all down to the Skelton family that we finally got justice.""