DUBLIN (CBS SF) – A junior golf instructor accused of molesting some of his teenage students may have also been plotting to kill his alleged victims.

According to the Bay Area News Group, prosecutors in the case of 32-year-old Andrew Nisbet said he attempted to hire a hit man to kill his three alleged victims. A probable cause document filed in court and released Tuesday said that this alleged murder-for-hire plot began while Nisbet was in jail, as according to prosecutors, he began exchanging letters with someone he thought he could hire to kill his victims.

READ MORE: Livemore Man Arrested in Series of Sexual Battery Attacks on Female Joggers

An informant tipped off a sheriff’s deputy and the letters were sent to the Alameda County District Attorney’s Office in late February. According to a sworn statement from Alameda County District Attorney’s Office Inspector Jeff McCort, the letters contained personal information about the three boys and asked to have them “taken care of.”

After receiving the letters, a county investigator visited Nisbet in jail, posing undercover as a hit man. According to the statement, Nisbet mouthed the names of the victims to the undercover investigator, promised to pay upfront, and also suggested the investigator take the victim’s cellphones, to make it seem like a robbery.

READ MORE: A's Stadium Environmental Impact Report Clears Oakland Planning Commission, City Council Next

Shortly after this meeting, authorities served a search warrant on Nisbet’s cell at Santa Rita Jail in Dublin. They found a letter with driving directions to one victim’s home in Pleasanton and other letters discussing the plot to kill his alleged victims.

Nisbet was arrested on December 7, 2013 and charged with molesting three teenage boys between 2007 and 2012, in the parking lot of the golf course where he taught, at his home, and on out-of-town trips. His alleged victims were between the ages of 12 and 17 at the time of the reported abuse.

Prosecutors have added solicitation of murder counts to the multiple charges that Nisbet already faced. He remains at Santa Rita Jail and is being held without bail.

MORE NEWS: Yosemite Rolls Out Winter Lottery for Summer Camping at Popular Site

Nisbet was a nationally known junior golf instructor and before his arrest, had worked at Las Positas Golf Course in Livermore since 2006.