Disturbing body cam footage has surfaced online showing a mentally ill man being shot to death by police.

The incident first occurred in June 2014 when Jason Harrison’s family called 911 for medical help.

Jason's mother is seen opening the door and walking out of the house when Jason walks up holding a screwdriver. Police asked the young man to put the tool down and that is when the situation escalates and gets out of hand.

Jason was only 28-yrs-old and suffered from bi-polar/schizophrenia.

He was in need of medical attention at the time of the call.

Here's more on this story from WFAA Dallas.

Full 3 minute video of the incident: