On May 13, 2005, Connecticut executed Michael Bruce Ross by lethal injection after convictions in the murders of four women; contemporaneous reports described it as Connecticut's first execution in 45 years.

Connecticut has carried out no further executions since the Ross case. In 2015, the state became the 18th in the nation to abolish the death penalty.

Ross was convicted in 1987 and sentenced to death; his sentence was thrown out on appeal, then reimposed in 2000 after resentencing. The Connecticut State Library chronology also records a May 2005 competency and waiver milestone before the execution.

Outside Osborn Correctional Institution, anti-death-penalty protesters gathered before the execution, with a smaller group supporting the state's use of capital punishment.