A Mission pastor has been charged after police say he sexually assaulted an unconscious woman after injecting her with an unknown substance.

A female parishioner of Vida Abundante reported to police earlier this week that the church’s pastor, 52-year-old Melquisedec Chan, sexually assaulted her at her Edinburg home when treating her for an illness, according to a news release from the Edinburg Police Department.

Vida Abudante’s website lists Chan as a professional surgeon. According to the Texas Medical Board, however, Chan is not licensed to practice medicine in the United States.

Police secured warrants and arrested Chan on Wednesday.

On Thursday, Chan was charged with aggravated sexual assault, a first-degree felony; and practicing medicine without a license, a third-degree felony.

Bond was set at $750,000. 

Investigators say this may not be the first time Chan has committed this type of crime and urges anyone who believes they may be a victim to file a report with their local police department.