A Brooklyn man has been convicted in the brutal murder of a high school student whose naked body was found crammed into laundry bags in a Bushwick alley in 2004 — and who may have been used to test out her killer’s perverted sex-toy invention.

Jurors found Kwauhuru Govan guilty on all counts in the slaying of 17-year-old Sharabia Thomas, who lived near the now-40-year-old man in the Brooklyn neighborhood before she disappeared.

The teen suffered blunt force trauma to the head and had visible ligature marks on her wrists and ankles.

A crude sketch of a chair designed to restrain women during sexual encounters was later found in Govan’s possession, and prosecutors argued that the ligature marks on Thomas matched the design of the chair — which he called a “sex pod” in journal entries.

Jurors saw four pages of the journal detailing the design of the “sex pod,” which one note described as “a light-wight [sic] carbon fiber tripod that allows a person to sit on it while having sex, with leg strips and hand grips to pull the legs up and down. Small enough to carry but strong enough to hold a 200Ibs person during sex.”

Govan, a Jehovah’s Witness, was arrested in 2016 after his DNA was found on fingernail clippings from Thomas, as cold case investigators reviewed old cases. He claims he never knew Thomas.

“Sharabia’s bravery when she fought for her life helped bring her killer to justice and he has now been held responsible for this brutal years-old murder,” Brooklyn District Attorney Eric Gonzalez said in a statement.

Govan, who faces up to life in prison for the slaying, is still awaiting trial for the 2005 murder and dismemberment of 19-year-old relative Rashawn Brazell.

Brazell, who was gay, lived across the street from Govan before he disappeared.

His severed limbs were later discovered strewn across the city’s subway tracks — sparking fears in the city there was a killer MTA worker on the loose.

Govan is scheduled to return to court for sentencing in September.