LINCOLN, Neb. – The former head of Nebraska’s prisons said Friday he was never forewarned about a prisoner’s threats to kill people after getting out of prison (which he did) and never told of a state Supreme Court decision clarifying how prison sentences should be calculated.

During three hours of questioning Friday morning before a special investigatory committee of lawmakers, Bob Houston largely professed ignorance about red flags Nikko Jenkins repeatedly raised before being released and killing four Omahans within weeks last year. And he also said he was never informed that a Supreme Court decision made it clear prisoners’ sentence were being calculated incorrectly, shortening sentences for some of the state’s most dangerous inmates.

Houston resigned from the job in September after a 38-year career, saying he left on his own accord because he felt he was becoming “a controversial public official.”