MCKINNEY (CBSDFW.COM) – Police spent the final moments of daylight Thursday inside chiropractor David Russell’s McKinney clinic, gathering potential evidence against the doctor who was twice arrested for sexual assault of a child within one week.

Police will not say what they were searching for, but they appeared to be executing a search warrant in conjunction with a criminal affidavit filed earlier this week.

That filing alleged a potential four victims, two more than first reported. Russell, 42, was initially arrested after two victims – now believed to be 13 and 18 years old – filed separate complaints alleging the chiropractor sexually abused them during treatments for groin injuries.

The two took dance classes at the Taylor Dance Studio located off North Central Expressway. Police reported that Russell taught stretching and conditioning classes there. It’s alleged, though, that the incidents took place at his personal chiropractic office.

He was arrested on Oct. 28 and again on Nov. 4 on counts of sexual assault of a child, a first degree felony. He has since bonded out.

Police are continuing their investigation with the assistance of the Children’s Advocacy Center of Collin County.

Russell declined to comment Thursday night, passing CBS 11 on to his lawyer. The chiropractor’s attorney has not returned requests for comment.