And so when the accused man’s wife sat for an interview on Monday on Fox & Friends, a favorite show of President Trump’s, she appealed directly to the commander in chief.

“I’ve seen Trump help Americans in peril around the globe, and we really need his help,” Kallie Hapgood, 44, said.

Sure enough, Mr. Trump responded.

The president weighed in promptly on Twitter, mentioning the show and vowing to look into the case of Gavin Scott Hapgood, 44, who was charged with manslaughter after a deadly April struggle with a worker, Kenny Mitchel, 27, in a hotel room on the island of Anguilla.

“Will be looking into the Scott Hapgood case, and the Island of Anguilla,” the president wrote on Twitter. “Something looks and sounds very wrong. I know Anguilla will want to see this case be properly and justly resolved!”