Crimson Death

Engineer Hadi Tamim was found covered in blood, suffering from a severed carotid artery. He was rushed to the hospital where he received treatment that gave him a new lease on life. However, he was found dead two days later. The stab wound was not the cause of death, and the question that baffled investigators remains: how did Engineer Hadi Tamim die, and who was the perpetrator if not the person who stabbed him?