BOSTON, June 23, 2016—A jail guard now suspended from his duties was arraigned today on charges that he had improper sexual contact with an inmate under his supervision, Suffolk County District Attorney Daniel F. Conley said.

MARLON JUBA, 29, was arraigned today in South Boston Municipal Court following his arrest yesterday by Boston Police. Assistant District Attorney Amy Martin recommended that he be held on $150,000 cash bail. Judge Ernest Sarason imposed bail of $20,000.

Juba is charged under Ch. 268, Sect. 21A, of the Massachusetts General Laws, which presumes that inmates are unable to consent to sexual contact with employees of jails, prisons, and houses of correction and which carries a maximum penalty of five years in state prison.

Juba is accused of having sexual contact with the female victim while she was in custody at the South Bay House of Correction, where he was a corrections officer. The victim is no longer at South Bay.

Martin told the court that the Suffolk County Sheriff’s Investigative Division was initially investigating Juba for bringing drugs and other contraband into facility. In the course of that investigation, they learned of information suggesting he had an inappropriate relationship with an inmate. Sheriff’s investigators conducted interviews, reviewed surveillance camera footage, and gathered other forms of evidence suggesting that he had an improper sexual relationship with a specific female inmate, leading to his suspension from duty.

The evidence gathered by the Suffolk Sheriff’s investigators was corroborated by evidence gathered by Boston Police Sexual Assault detectives, including a sexually explicit letter to Juba from the inmate recovered during a search warrant at his home. Boston Police arrested Juba yesterday.

Juba was represented today by attorney Eduardo Masferrer. He will return to court on Aug. 23.

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All defendants are presumed innocent until and unless proven guilty beyond a reasonable doubt.