SAN LEANDRO (CBS SF) — An Alameda County sheriff’s deputy has been charged with misdemeanor child molesting for allegedly sending sexual text messages to a 15-year-old girl and inappropriately touching her, according to court documents.

Jason Deitschman, 49, of Castro Valley, a nine-year sheriff’s veteran who worked as a patrol deputy out of the Eden Township substation in San Leandro, was charged and arraigned late last month and pleaded not guilty to the charge against him.

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Deitschman has been placed on administrative leave, according to sheriff’s spokesman Sgt. Ray Kelly.

Detecting Sgt. Lauren Tucker of the sheriff’s Special Victims Unit wrote in a probable cause statement that her office started investigating Deitschman on Oct. 29 after it received information that he had sent numerous inappropriate text messages to the 15-year-old girl.

Tucker said the girl provided screen shots of the text messages and many of them “were sexually inappropriate in nature.”

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The girl also told investigators that she felt uncomfortable being around Deitschman and disclosed an incident in June in which he was giving her a massage for a sore back, according to Tucker.

The girl alleged that Deitschman unsnapped her bra, moved his hands to her buttocks, put his hands underneath her shorts and made skin-to-skin contact, Tucker wrote.

The girl disclosed the incident to her siblings and a friend, who ultimately brought the matter to the attention of law enforcement, according to Tucker.

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Deitschman’s attorney Elliot Silver couldn’t immediately be reached for comment.