A 64-year-old convicted sex offender was convicted of rape, sodomy and other charges Wednesday, seven years after his alleged crimes against a 19-year-old victim occurred.

Curtis Clint Williams was found guilty of first-degree rape, sodomy, unlawful penetration and three counts of sexual abuse, the Multnomah County Sheriff’s Office said.

A newly tested rape kit led to Williams’ arrest in June last year.

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Court documents from the time state he raped the 19-year-old woman inside the Alder Hotel Apartments in downtown Portland in 2011.

The Portland Police Bureau launched an investigation into Williams in September that year.

Detectives say the 2017 arrest was made after the sexual assault forensic evidence kit connected to the case was submitted for testing.

The 19-year-old woman said she did not previously know her attacker and reported the assault immediately after leaving the apartment.

Portland police received a Sexual Assault Kit Initiative grant in 2015.

Since that time, detectives have tested, contacted survivors and investigated cases stemming from untested kits in the possession of the bureau.

The first shipment was sent to a private laboratory in April 2016 and all the untested Portland Police Bureau kits have been submitted for testing, a bureau spokesperson said.

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