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RIPLEY, Okla. – A 14-year-old Oklahoma girl is charged with murder.

Investigators say 14-year-old Makayla Brown shot and killed a man in his own home.

Court records show the girl knew the man because he’d been in a relationship with her mother.

Investigators are looking into whether she plotted the murder to get revenge on the man because he’d been abusive to her mother in the past.

The murder happened at 45-year-old Mario Smith’s home in Ripley, just east of Stillwater.

Smith was found lying face down on his kitchen floor in a pool of blood.

A shell casing was next to him.

“I seen at least 15 county cars over here at once and then I seen people in black suits,” J.R. Battle said.

Battle couldn’t believe a murder happened so close to home in their small town.

Battle said Smith kept to himself.

“You know I’d seen his car out here, but I’d never seen him,” Battle said.

Court records show Makayla Brown and her mother were at Smith’s home with several friends the night of April 19th.

One woman told investigators she saw Brown shoot Smith once in the head.

She said she thought it might be “because a month earlier, Mario had pistol whipped Makayla’s mother in the head.”

State investigators also interviewed another woman last week, who said Makayla Brown came over to her house after Mario was found dead, and that Brown “was laughing when she told her she killed Mario.”

The woman said she “felt like Brown was bragging about killing him.”

Investigators searched Brown’s home in Stillwater, but they couldn’t find the murder weapon.

Smith has been in his own trouble before.

He’s a convicted felon who got arrested most recently on a slew of charges for drugs, racketeering, assault and battery, and concealing stolen property.

He was due in court the very next morning after he was killed.

The district attorney charged Brown as an adult.

She’s being held without bond in Payne County.