Shocking CCTV footage shows 37-year-old Vicente Antonio Bermudez Zacarias being shot in the head while he was out jogging in Metepec, 30 miles west of Mexico City.
The mystery gunman runs behind him before shooting him in the back of the head at point-blank range.
Bermudez lays dying in the street as the gunman flees. According to local reports he was rushed to hospital where he later died.
Scroll down to watch the sad clip.