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MEMPHIS, Tenn. — A registered sex offender is back behind bars after confessing to the 2015 rape of a woman in Whitehaven.

According to a police report, the woman was attacked in a quiet neighborhood around 8 p.m. on September 8.

The victim told investigators she was inside her home in the 4800 block of Fairfield when a man knocked on her door and identified himself as a Shelby County Sheriff’s deputy.

He then forced his way inside the home.

When the victim reportedly grabbed on to his dreads and refused to let go, the suspect began punching her in the face until she lost consciousness.

Family members found the victim more than 36 hours later severely bruised with subcranial bleeding.

They rushed her to the hospital where doctors discovered the victim was raped too.

Investigators arrested Stanley Jefferson, a convicted child sex offender already being monitored by the Tennessee Department of Probation and Parole through a GPS tracker.

WREG discovered Jefferson was convicted of aggravated sexual battery in 2007 and criminal attempt to commit rape in 2003.

He was arrested on Monday, nearly seven months after the attack, and reportedly confessed to everything.

Jefferson even told police he stole the victim’s cellphone and car.

He has been charged with aggravated rape, especially aggravated robbery, especially aggravated burglary and theft of property.

He will be in court on Tuesday.

It’s unclear at this time why it took police so long to catch Jefferson if he had a GPS tracker.

As for the victim, people in the neighborhood said her family is taking care of her.