A 19-year-old from Mastic Beach is accused of sending a video of himself engaged in a sex act with his dog to a person on Grindr, a dating app.

After Zachary Carlisle sent the video of himself to the Grindr user, Suffolk SPCA officials say the out-of-state recipient immediately contacted authorities.

The investigation apparently led to the discovery of more than just the alleged sexual misconduct.

Authorities say Carlisle was also in possession of child pornography.

He’s facing a 26-count indictment.

News 12 went to Carlisle’s home and reached out to his attorney and did not hear back.