'El Kalimba' underwent a plastic surgery on his face. This to take on a different identity and to lead a normal life. He was anesthetized when shot close to him.
For some time, the Mexican authorities were looking for Martin. Presumably, the murder was estimated by 'El Irving', the leader of a rival cartel.
The staff at the hospital where Jesus Martin was operated is still being questioned by the police. Presumably, someone has tipped the perpetrators about the time of operation.
In total, twelve people were killed in the state of Puebla on Monday. Presumably, all murders have something to do with the battle between the two rival cartels.