CONCORD, N.H. — The owner of a New Hampshire mortgage company who used electronic billboards to accuse three businessmen of crimes is liable for $274.5 million in damages in a defamation lawsuit against him, a jury found Friday.

Michael Gill, head of The Mortgage Specialists, has targeted other businessmen, politicians, lawyers, and judges in his electronic signs through the years.

Last year, he put up images of an auto dealer CEO, a banker and a developer, accompanied by the words “drug dealer” and “extortion,” on a large billboard outside his Manchester office off a busy highway. He also made similar references to them online and on radio and television.

The businessmen had donated money to the development of a nonprofit drug and alcohol recovery treatment center. They sued Gill, saying he falsely accused them of crimes and demonstrated “ill will, evil motive, intent to injure and wanton disregard” for their rights.

A judge this month found Gill liable for damages, and a trial was held this week to determine the amount.

Gill represented himself, but left before a jury was picked, calling the proceeding a criminal enterprise.

Andrew Crews, the auto dealership CEO, testified he didn’t understand why he was targeted. He said the attacks hurt his family and his business.

“Somebody had to turn around and stop the bully,” WMUR-TV reported him saying in court.

Gill said Friday he spoke the truth and planned to appeal the verdict. When asked if he had any business association with the three men, he said no.

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