CALDWELL, Idaho — A Caldwell man who admitted to police that he had been molesting children for decades is headed to prison. 

Mac W. Henderson, 58, was sentenced Thursday to 25 years in prison, with at least 15 years before he will become eligible for parole. 

He pleaded guilty in January to two counts of lewd conduct with a child, after a boy and girl told investigators that Henderson had sexually abused both of them for years, starting when they were about five years old. Both victims also told police that Henderson forced them to watch pornography - including child pornography - at his Caldwell home. 

When detectives interviewed Henderson, he admitted molesting the boy and girl who came forward, and gave police another chilling confession. 

"This goes back years, I should have been taken in back in the late 70's," he said, according to court documents.  "I have been molesting kids for a while."

MORE: Admitted Caldwell child molester may have victims dating back to 1970s, police say

Police put out a call for any other victims to come forward after Henderson's arrest, noting the defendant had lived in California, Oregon and Nevada before moving to Caldwell in 2001.

According to a Canyon County spokesman, an additional case is being reviewed for possible charges. Detectives also identified other potential victims, who said they did not want to go forward with charges.

Prosecutor Bryan Taylor said in a statement after Henderson's sentencing that the long prison sentence handed down by Judge Christopher S. Nye was appropriate.

"Mr. Henderson used his position of authority to groom these two young victims and take advantage of them for his own sexual gratification," said Prosecutor Bryan Taylor.  "And by his own admittance, this wasn't his first time.  There is no doubt that he belongs in prison where he can no longer prey on young children."