James Handy's Gruesome Final Moments Revealed In Medical Examiner Report

Gruesome details on the death of James Handy have been revealed in the medical examiner's report ... which describes an intense altercation between the "Top Gun: Maverick" actor and his girlfriend's son, Michael Gledhill.

According to the ME ... James and Michael got into a verbal altercation on June 4 outside the front porch of the girlfriend's home.

The report says things got physical ... with Michael mounting James before dragging him to the side of the house, going back inside to retrieve what "appeared to be a knife" ... then returning and stabbing James to death.

According to the ME ... while James laid on the ground with a fatal stab wound on his torso ... Michael allegedly called 911 and said, "I am the son of man, I just killed the man of sin."

Cops rushed to the scene where Michael allegedly flagged them down and confessed to the crime ... meanwhile James was rushed to a hospital, where he was pronounced dead.

James was arrested shortly after the incident ... and now he is being held on $2 million bail in a Van Nuys Jail on a murder charge.