LAS VEGAS >> Relatives of an unarmed man who died after a struggle with a police officer outside a Las Vegas casino want the officer fired and brought up on criminal charges for repeatedly using a stun gun and then placing the man in an unauthorized chokehold, an attorney for the family said today.

Las Vegas police should also stop using stun guns and training officers to use a neck restraint intended to cut off the flow of blood to the brain, attorney Andre Lagomarsino said.

“This was a fatal cocktail of misconduct,” Lagomarsino said a day after a top Las Vegas police official showed body camera video of officer Kenneth Lopera using his stun gun seven times on Tashii S. Brown, punching Brown several times and holding him in a mixed martial arts chokehold for more than a minute after a foot chase through The Venetian casino.

Lopera called the arm-around-the-neck maneuver a “rear naked choke,” Clark County Undersheriff Kevin McMahill said. It is not authorized for Las Vegas police.

McMahill said the hold differs from a department-taught technique called “lateral vascular neck restraint” or a carotid artery hold that proponents say does not impede breathing but instead restricts blood flow to the brain and causes loss of consciousness.

That method, which McMahill said can render a person unconscious within 10 seconds, is banned for use by police in many other cities, including New York, where the death of Eric Garner on a Staten Island sidewalk in July 2014 sparked a national debate about police brutality.

Records show Las Vegas police officers used the neck restraint 632 times over a 10-year span, including 51 times last year. That’s about once a week.

In Los Angeles, by comparison, the carotid hold is considered lethal force only to be used in life-and-death situations. Police there reported using it seven times in the last five years, including twice in 2016.

Lopera, 31, a Las Vegas police officer for five years, is on paid leave pending departmental and district attorney reviews of his actions. He has not provided police investigators with a statement.

Brown grew up in Hawaii, where records show he was convicted of assaulting his girlfriend and was released from prison in January 2016. He pleaded guilty in February in Las Vegas to misdemeanor driving under the influence.

The Las Vegas Police Protective Association is representing him, and union executive Steve Grammas said he was still collecting information.

Video may not tell the entire story, Grammas said.

“What the officer goes through physically and emotionally in a high-stress situation can’t be captured by a camera that just shows a picture of what’s going on,” the police union official said.

“I understand that they’re a grieving family. I know they’re hurting,” Grammas said. “Our officer didn’t want to go through something like this either.”