Nevada's most dangerous prisoner dies on death row after 41 years following series of heart attacks
Patrick McKenna, who had been the longest-serving prisoner on death row in Nevada, faced capital punishment after killing his cellmate in 1979
McKenna, then 32, choked 20-year-old prisoner Jack Nobles to death after a dispute between the two over a chess game in 1979
He had a long criminal history. After meeting two women in a seedy Las Vegas motel in 1978, he tied sheets around their necks and raped them.