Convicted murderer and former Fort Bragg Army Capt. Jeffrey MacDonald cannot get out of prison under a federal compassionate release law, U.S. District Judge Terrence Boyle said in a ruling issued on Friday. MacDonald is serving three life sentences at a federal prison in Maryland for the murders in 1970 of his pregnant wife and two children at Fort Bragg, North Carolina. He has claimed factual innocence. The compassionate release law allows some federal prisoners over age 70 to get out of prison under certain circumstances, such as if they have served at least 30 years of their sentences or there are extraordinary and compelling reasons.