A 16-year-old girl claimed that Michael Fife, 62, sexually assaulted her on a bus

The girl told Logan police that they were on a Cache Valley Transit District bus

She then called her 17-year-old brother and told him about the alleged assault

Her brother then located Fife getting off the bus and assaulted him, police said

Police said Fife fell to sidewalk, suffered head injuries and was left unconscious

Detectives reviewed video of incident that showed Fife walking past the girl

Authorities said no sexual assault occurred; Fife succumbed from his injuries

A 62-year-old Utah man has died after a teenage boy attacked him for sexually assaulting his younger sister on a bus, an incident that police say never happened.

Michael Andrew Fife was attacked by the 17-year-old boy on April 23.

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According to Logan police, a 16-year-old girl told her older brother that she was sexually assaulted on a Cache Valley Transit District bus.

The girl claimed that she was attacked by Fife around 3pm while they were both on the bus.

Michael Andrew Fife (pictured), 62, of Utah, has died after a teenage boy attacked him for sexually assaulting his younger sister on a bus, an incident that Logan police say never happened. He succumbed to his injuries on April 27

According to Logan police, a 16-year-old girl told her older brother that she was sexually assaulted on a bus by Fife (pictured) around 3pm

Authorities said the teen boy immediately went after Fife and attacked him near 300 South and 100 West while he was getting off the bus, according to KSL.

Fife suffered head injuries and was left unconscious, and the teen fled on foot. A witness called first responders and the victim was rushed to Logan Hospital.

Three hours later, around 6.15pm, the girl called police to report the alleged attack.

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Investigators reviewed video footage of the incident that showed Fife walking past the girl, but authorities said no sexual assault occurred, according to KSL.

Fife's family, said that his injuries were so bad that he was transferred to McKay Dee Hospital in Ogden.

He succumbed to his injuries on April 27.

Authorities said the teen boy immediately went after Fife and attacked him near 300 South and 100 West (pictured) while he was getting off the bus

The teen girl claimed the incident occurred on a Cache Valley Transit District bus (file image). When police reviewed the footage, it showed Fife walking past the girl, but authorities said no sexual assault occurred. Police are still investigating the incident

According to the family's GoFundMe, doctors had to perform emergency surgery on Fife's skull to relieve the swelling of his brain.

The family said Fife leaves behind his only child Michael Andrew Fife II. Fife's friends created the account to help the family with funeral costs.

'The financial burden of this unforeseen act of violence, falls to Mike. Mike is currently not in the best of situations and cannot afford to lay his dad to rest without a little help,' the account reads.

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Authorities are still investigating the case. The identities of the teenagers have not been released.