A 24-year-old Montgomery County man who is a registered sex offender was charged this week with child rape and crimes related to sharing child pornography through a social media platform, authorities said.

Brian Groo, of Horsham, was quickly investigated and charged after the National Center for Missing and Exploited Children on Wednesday morning sent a tip to Montgomery County detectives about two videos that had been uploaded to the social media platform. Kik, the Montgomery County District Attorney reported. The office said. The tip originally came from the platform.

Investigators traced the account to Groo, who lives with his mother, according to the police affidavit of probable cause for his arrest. From September 12 to October 7, an account associated with Groo allegedly uploaded seven videos or images of alleged child pornography to Kik.

Investigators noted that on Oct. 13, Horsham Township police responded to a domestic disturbance call at Groo’s home and spoke with him and his mother, the affidavit states. The affidavit does not provide details about that domestic disturbance call.

In 2021, Groo pleaded guilty to a 2019 charge of disseminating child pornography and a related crime. He was sentenced to less than two years in prison and five years of probation and was required to register as a sex offender.

Groo’s probation officer told investigators he last visited Groo at his home on Tuesday, the affidavit states.

County detectives executed a search warrant at Groo’s home on Wednesday, the same day they first received the tip.

Groo allegedly cooperated with detectives, giving them his “secret phone number” and explaining that he had met a woman on Kik who shared with him a child sexual abuse video that she claimed involved her daughter, and that Groo reciprocated by sending her to the woman a video of sexual abuse of a 10-month-old child to which she had access, the affidavit states.

Bail for Groo was set Thursday at just over $2 million. He was being held at the Montgomery County Correctional Facility and has a court appearance scheduled for Nov. 14.