Saul Grisman is an assassin with the CIA.
As an orphan growing up in the state facility, Grisman had one friend, another boy named Chris. Though Grisman was Jewish and Chris a Catholic, they became inseparable. Between Chris' brains and ability to observe and Saul's physical prowess and willingness to stand up to the other kids, they survived.
After a few years, when the boys were in their early teens, the old man came. At first he befriended Chris, bringing him candy and taking him to baseball games and other outings. Then at the old man's insistance and to Chris' delight, Saul was added to the events. Over the course of several years and many sporadic visits, they grew to have a deep affection for the old man and he seemed to feel the same.
What he never bothered to tell them was that he worked for the CIA and was grooming them to be become assassins, willing to obey his commands without hesitation and without questioning. It took years but when he felt the time was right, he put them to work, creating his own pair of operatives that the Agency didn't know about, his own two killing machines.
It should have gone on like this indefinitely but trouble at home made the old man worried about his future and he grew to fear what would happen when their existance became known. He had risen far enough in power that they were becoming a potential embarrishment or worse, the means to destroy him if they were discovered. To eliminate the possible danger he now perceived them to be, he set them up to die.
Chris dies. Grisman lives. Bad luck for the old man.