A murder mystery like no other - two apparently unrelated crimes, 11 years apart. One is a relatively harmless teenage prank. The other a cowardly murder of a Canberra grandmother. 72 year old Irma Palacsics was bashed and murdered in her own home in 1999. Fifteen years on, the killers probably thought they'd got away with it, but a recent break-in at a local “pitch and putt”, has this cold case warming up. Extraordinary new forensic science has linked the two crimes and, now, a son is about to betray his killer father.