CONCORD — A federal judge has ruled a Maine man serving four years in prison for operating a $5.6 million investment fraud scheme with 36 victims — including three who lost their homes — and failing to file federal income tax returns should be released from jail over coronavirus fears.

William Bischoff, 79, was sentenced to four years in federal prison after pleading guilty in 2018 to defrauding more than two dozen clients of his financial advisory business from 2009 through 2017 by falsely promising to invest their money in real estate, structured legal settlements, high-yield notes and a startup recycling business.