A Randolph man accused of producing child pornography has been charged by criminal complaint.

Alexander Carnahan, 27, was identified following monthslong investigation that began when the Jamestown Police Department on June 9 received notice of alleged child sexual abuse involving an 11-year-old.

According to a news release, the victim’s mother advised officers that one her children gave her a cellphone belonging to Carnahan, who had been staying with the family, and told her there were nude images of the victim on the phone.

“The victim’s mother searched the phone and found what she believed to be nude images of the victim,” the U.S. Attorney’s Office said. “The mother then kicked Carnahan out of the family residence.”

During a search of Carnahan’s Google account, investigators reportedly recovered several images and videos that appeared to match descriptions provided by the victim’s mother. The investigation determined that the Randolph man allegedly transferred the images and videos from his phone to his Google account.

Investigators also recovered child pornography images that Carnahan did not produce himself.

On Thursday, a search warrant was executed at Carnahan’s current residence in Randolph. A second warrant authorized photographs of Carnahan’s hands to determine whether his hands matched a hand seen in the images of child pornography recovered by investigators.

The charge carries a mandatory minimum penalty of 15 years in prison and a $250,000 fine.