Daniel Penny's martial arts instructor from the Marine Corps took the stand Thursday for day six of witness testimony in Penny's trial in the chokehold death of Jordan Neely.

A former Marine combat instructor testified that Daniel Penny misused a combat maneuver when he fatally choked Jordan Neely aboard a Manhattan subway, saying he appeared to have attempted a “blood choke” and should’ve known to let go after Neely lost consciousness.

The military trainer said that Marines are taught to render a person unconscious in seconds. Mr. Penny held Jordan Neely, a homeless man, for six minutes.

The man seen on video helping Daniel Penny restrain Jordan Neely on board the subway last year took the stand Tuesday on day five of witness testimony in Penny's trial.

Penny held Neely in a chokehold for about six minutes — including for more than 50 seconds after Neely stopped moving — according to evidence presented in his criminal trial.

A former military combat instructor says a fellow Marine veteran misused a combat maneuver when he fatally choked a homeless man aboard a Manhattan subway last year

In the eighteen months since the killing, Penny has been embraced by conservatives as a good Samaritan who used his military training to protect his fellow riders. U.S. Rep. U.S. Matt Gaetz, who

Done right, the maneuver should knock a person out without killing them, according to a Marines combat instructor who trained Penny. But held too long, the technique can restrict the flow of blood

When Daniel Penny fatally choked a homeless man aboard a Manhattan subway last year, the veteran appeared to be using a combat technique that he learned in the Marines, according to a martial arts instructor.