Alex travels back to Houston to meet Les Ribnik, one of Angel Resendiz's appellate attorneys. Before the Railroad Killer's execution, Ribnik, believing his client may have information about other murders, was quoted as saying: "The state should be patient and wait for my guy to die another day so these other cases can possibly be cleared."

So what did Resendiz tell Ribnik about the murder of Daryl Kolojaco?

Presented by Alex Hannaford and produced by Peter Sale