Something tells me it wasn’t “voluntarily.”

Via Times of Israel:

The parents of an Indiana aid worker threatened with beheading by the Islamic State group say he told them in a June letter he’s afraid to die.

Ed and Paula Kassig also say a former hostage told them 26-year-old Abdul-Rahman Kassig converted to Islam voluntarily when he was sharing a cell with a devout Syrian Muslim. Their son was previously known as Peter Kassig.

In a statement released to media Sunday, the Kassigs say their son told them in the letter that he’s scared to die, but that if he does they should take comfort knowing he “went out as a result of trying to alleviate suffering and helping those in need.”

The Islamic State group took the 26-year-old Kassig captive on Oct. 1, 2013.

The parents also released a video Saturday pleading with Kassig’s captors to free him, saying their son has devoted his life to humanitarian work and aiding Syria’s war refugees.

The parents’ video was released a day after the Islamic State group’s online video threatened to behead 26-year-old Peter next — following the beheading of British aid worker Alan Henning.