(CNN) -- Slain Colorado prisons chief Tom Clements was a "dedicated, committed, funny, caring expert at corrections" who tried to ensure that prisoners had adequate support before their release, Colorado Gov. John Hickenlooper said in an emotional news conference Wednesday morning. "In many ways he helped define what a public servant is. He did his job quietly and intently." Clements was fatally shot at his Colorado home Tuesday night, police say.