Martin John Bryant is an Australian mass murderer who shot and killed 35 people and injured 23 others in the Port Arthur massacre between 28 and 29 April 1996. He is serving 35 life sentences plus 1,652 years without the possibility of parole at Risdon Prison in Hobart.

The Port Arthur massacre was a mass shooting that occurred on 28 April 1996 at Port Arthur, a tourist town in the Australian state of Tasmania. The perpetrator, Martin Bryant, killed 35 people and wounded 23 others, the deadliest massacre in modern Australian history. The attack led to fundamental changes in Australia's gun laws.