The state Board of Pardons refused Thursday to recommend commutation of the life prison sentences for a man who committed one of Delaware's most notorious crimes and then killed a San Francisco businessman. The board deliberated less than three minutes in deciding not to recommend commutation for Charles Cohen, 41, who pleaded guilty but mentally ill in the brutal 1988 murders of his parents, Martin and Ethel Cohen. "In light of the heinous nature of these crimes, the opposition of the state Board of Parole, and the obvious threat to society, we will not recommend that commutation be granted," Lt....