Suicide by self-inflicted stab wound of the chest.

@article{Shiono1986SuicideBS,
  title={Suicide by self-inflicted stab wound of the chest.},
  author={Hiroshi Shiono and Yoshinori Takaesu},
  journal={The American journal of forensic medicine and pathology},
  year={1986},
  volume={7 1},
  pages={72-3}
}
A case is presented in which a 44-year-old man stabbed himself in the heart with a kitchen knife, then changed his bloody clothes, and ate lunch with his aunt, who did not notice the event. After 2 h he died of cardiac tamponade.