PICTURED: American father-to-be, 21, shot TWELVE TIMES and killed by Mexican Army

Surveillance video captured the moment two military trucks chased down a pickup truck driven by an American man before he and four other young men were shot after he allegedly failed to stop and crashed into a car, an autopsy report revealed.

Gustavo Suárez was driving his friends back home in a Chevrolet Silverado pickup truck after they had left a local night club and was spotted speeding down a street with his headlights off in the northern border town of Nuevo Laredo on Sunday.

The 21-year-old refused to pull over after he was instructed by the soldiers and lost control of the pickup truck before he plowed into a parked car, according to a police report.

The soldiers then fired 12 shots at Suárez, who split his time between his hometown of San Antonio, Texas, and Nuevo Laredo.

El Pais newspaper reported Suárez on Saturday had learned he was going to be a father for the first time.

Humberto Suárez shares a hug with a family member after the burial of his son, Gustavo Suárez, one of the five men who were shot dead by the Mexican military Sunday in the northern border city of Nuevo Larado

Wilberto Mata, who was sitting in the front passenger seat, was shot 10 times and died.

The autopsy report showed that Gustavo Pérez died after he was shot two times – on the side and on the right forearm.

Another victim, Alejandro Trujillo, died from being shot five times. Jonathan Aguilar did not survive after he was struck in the temple.

Luis Gerardo was shot two times and remained in an induced coma as of Thursday.

Mexico President Andrés Manuel López Obrador came to the defense of the six men and slammed the military's response.

The leftist leader said he would not allow the execution of civilians, even if it meant assassins were the target of an operation.

'The authority, in this case the Prosecutor's Office, has to carry out the complete investigation and also clarify one thing, even if it has to deal with alleged hitmen, you can't allow the execution of anybody, we are no longer in the time to kill them in the heat of the moment or to finish them off. None of that.'

Residents provide comfort to Humberto Suárez (sitting on the ground), the father of Gustavo Suárez, an American man who was among five young men shot dead by the Mexican military on Sunday in the northern border town of Nuevo Laredo 

Gustavo Suárez's father, Humberto Suárez (second from left),  lunges at a soldier during a confrontation between civilians and the military after his 21-year-old son and four other young men were killed. A sixth victim was shot at least twice and is in an induced coma

Nuevo Laredo Human Rights Committee director Raymundo Ramos confirmed to DailyMail.com on Wednesday that 12 soldiers were present during the shooting and that four have admitted to having fired their weapons.

The Defense Department said in a statement that the soldiers started shooting when they heard the loud noise of the crash, but did not say if the servicemen though the loud impact was a gunshot.

The soldiers were ordered to stand down and stop firing by their captain, who has only been identified by his first name, Elio, according to a police report.

The report also indicated that captain Elio did not order the four soldiers to shoot at the vehicle.

A civilian kicks a Mexican soldier during a violent confrontation Sunday after five young men were killed by the military 

Pérez's brother, Alejandro Pérez, was unharmed and told Univision that he saw the moment his sibling was shot at point-blank range.

He revealed that the soldiers forced him into making a video statement in which he claimed the group was responsible for the incident in exchange for sparing his life.

The killing in the dangerous border town of Nuevo Laredo sparked a violent confrontation between friends and relatives of the victims and the military on Sunday.

Video footage recorded by a bystander showed Suárez's visible shaken father, Humberto Suárez, charging at a soldier while the military was trying to remove the pickup truck from the scene.