Discuss the events that happened in the deal Milo calls "The Deal Gone Wrong"?

When Milo meets Alex at Bitter Canyon, they talk about Jamey's case and Radovic's murder. Milo tells Alex that two bikers were involved in the slasher murders and that the same bikers also killed Radovic. Milo calls the murder "The Deal Gone Wrong" because Radovic was not really meant to be killed.