An enraged dad is facing assault charges after he allegedly beat up 20-year-old lad he found in his 14-year-old daughter's bedroom.

Ismael Casillas, 41, from the US state of Georgia was said to have 'crossed a line' when he tore into Keywontrezes Humphries and broke some of his teeth on July 4.

The dad was also said to have knocked the young man unconscious and choked him at the family's home in Coweta County, in the early hours of the morning, according to local reports.

Fox 5 Atlanta report he is now facing a charge of aggravated assault with the local Sheriff's office adding Casillas wouldn't let Humphries leave the household – leading authorities to press charges,

Ismael Casillas found the young man inside his teen daughter's room on July 4th and flew into a rage, its alleged

Meanwhile Humphries, known by the nickname 'Man Man,' also is accused of child molestation for allegedly for an alleged sexual relationship with the 14-year-old girl, who has not been named.

It's alleged things got out of hand further when Casillas is claimed to have asked his wife to bring him his gun.

At this point Humphries legged it out the bedroom window to escape with the furious dad reportedly firing shots at the young man as he ran out of the front yard.

Casillas's wife is trying to raise money to pay for his legal fees as he faces aggravated assault charges

Investigator Scott Kilgore said: "There is a line that he can't cross, we can't cross, when somebody is no longer a threat to you.

"My advice would be let it go and contact us and let us handle it. Don't take it into your own hands."

The story came to light as Casillas' wife, Kristy Michelle Casillas, launched a GoFundMe campaign to help pay for her husband's legal fees.

Keywontrezes Humphries, 20, reportedly met the girl while playing computer games online

She claims Humphries met her daughter while playing Xbox games online, and decided ti drive two hours to the family's home to see her.

Ms Casillas said: "She is not innocent either but he was 20 and she was 14, she is not mature enough to understand what she did."

Georgia law allows homeowners to use force to defend themselves and their families from intruders, but only so long as they present a threat.