Sajiwa

Sajiwa, aka The Number Killer, is the tertiary antagonist of the Alex Cross novel Cross Fire. A math teacher with a criminal record, Sajiwa obsessively killed people and painted on their faces the numbers he taught in his class. Cross halfheartedly took on the case, and The Mastermind battled the investigation along the way.

Biography
The Number Killings first come to attention in the book when Cross' partner, John Sampson, requests consultation on the crimes. Kyle Craig, a corrupt escaped serial killer disguised as an FBI agent, briefly throws the case off track by killing a woman associated with the DCAK case to frame Sajiwa for the crime and make the profile more inaccurate. but Sajiwa's finally tracked and revealed as the killer, his criminal record revealed and the numbers in his class matching the numbers on the faces of the victims. Cross and Sampson go searching for Sajiwa for an arrest. To their shock, Craig beat them and killed Sajiwa as a continued manipulative tampering vendetta.