A man who travelled from Norway to Florida to surprise his father-in-law for his birthday was mistakenly killed by him after he leapt out of the bushes and startled him.

Richard Dennis, 61, was startled on Tuesday evening, when a relative, who isn't his son-in-law Christopher Bergan, began banging on his front door. Dennis, unsure who was outside, ran the person off, Santa Rosa County Sheriff Bob Johnson said in a press conference.

But, just a few hours later at 11:30 p.m., the banging started again -- this time at the back door, Johnson said. Dennis turned on the back door light and stepped out.

That's when 37-year-old son-in-law Bergan, fresh off a flight from his native Norway, jumped out of the shadows, scaring Dennis. He fired a shot, striking Bergan in the heart and killing him instantly, Johnson said.

"Investigation has revealed that this was totally accidental," Johnson said. "It was a really sad occurrence."

No charges are warranted in this case, Johnson said.

"Anybody who's religious out there, you need to pray for this family, because I can't imagine what they're going through," he said.