A gripping tale of muder and miscarriage of justice, 'Gun Alley' recounts the infamous 1921 rape and murder of 12-year-old schoolgirl Alma Tirtschke. In 1920s Melbourne with its underworld of drunks, criminals, prostitutes, phrenologists and fortune tellers, a combination of bungled defence, erroneous evidence - this was the first case in Australia decided on forensic evidence - and greedy, vengeful witnesses, led to what now seems the execution of an innocent man. Colin Campbell Ross, a local saloonkeeper with a history of crime and violence, was found guilty and hanged on April 24, 1922. Author Kevin Morgan believe he was innocent. A public sensation at the time, the case was histrionically played out day by day in the press - which, along with incredible pressure on police to secure a conviction, ultimately led to this failure of justice. Evidence uncovered during Kevin Morgan's exhaustive research leads to the question: who really raped and murdered Alma Tirtschke? He believes he knows the answer.