(Portland, OR) -- An investigation is underway into the death of a stabbing suspect who was in the custody of Portland Police. The incident happened Wednesday night. Police say the suspect punched the victim in the face and slashed his back with a knife. The victim threw a battery powered leaf blower and hit the suspect in the back. The suspect had trouble breathing and officers called medics. The man lost consciousness, police started CPR, but the man died at the scene. The Medical Examiner says the man had no signs of outside trauma. The cause of death is pending toxicology tests. The victim who was stabbed was treated and released from a hospital.