What is the most likely cause of Angelo Reyes’ suicide?

(29) A former Philippine military chief who had recently been accused of high-level corruption has died in an apparent suicide. Retired general Angelo Reyes is thought to have killed himself with a single gunshot wound to the chest. In recent weeks, a Congressional inquiry has been hearing statements of how General Reyes removed more than $lm from state funds. Early on Tuesday morning, witnesses saw General Reyes arrive in a cemetery in Manila. (30)They said he went to his mother’s grave, then sent his children back to the car, before a single shot rang out. He was pronounced dead on arrival at a nearby hospital.