Dallas County prosecutors said Thursday they will not pursue charges against two brothers who were arrested by DeSoto police officers last August in an incident condemned as brutal by Texas civil rights leaders.

The suburban police department had sought misdemeanor charges against Grant Bible, 20, and Sam Bible, 18, for allegedly interfering with officers who responded to a disturbance call at their DeSoto home.

Dashboard video, released by police in October after a Dallas Morning News investigation, instead showed officers reacting aggressively to a calm scene. Officers had tased Grant Bible for about 40 seconds as he lay face down in the street screaming. The video showed an officer grabbing his mother, Sammie Anderson, and slamming her to the ground.

Warning: this video includes images of violence and strong language. It has been edited for length and clarity and to remove personal information such as birth dates

Anderson filed a brutality complaint against the officers, and alleged her sons were falsely arrested.

Dallas District Attorney Faith Johnson’s office said Thursday it found no evidence justifying the charges. “Charges were declined in the interest of justice,’’ a spokeswoman said in a statement.

“I feel exhilarated,’’ said Grant Bible. “I feel like I can go on with my life now.’’

Sammie Anderson (second from left) with her sons Sam Bible (left), 18, Tyrone Anderson (third from left), 15, and Grant Bible (Brandon Wade / Special Contributor)

Dallas civil rights leader Rev. Peter Johnson had joined several others, along with the head of the Texas ACLU and Congresswoman Eddie Bernice Johnson, in decrying the officers’ treatment of the family.

Johnson, founder of the Institute for Non-Violence, said the DA’s decision was commendable, but “unfinished business’’ remains.

A DeSoto police internal affairs investigation recently cleared the officers of wrongdoing.

“There still needs to be an outside investigation of these officers’ actions,’’ Peter Johnson said.

The DA's spokeswoman told The News that her office is not investigating allegations of police brutality because no formal complaint has been filed with the DA, as required.

Rev. Peter Johnson of Dallas in front of a poster of Dr. Martin Luther King Jr. in his Oak Cliff office (David Woo / Staff Photographer)

Peter Johnson said that protocol makes no sense.

“Look at the videotape - if you see wrongdoing there, you have to respond to that,’’ he said. Johnson said he will ask the newly elected DA, John Creuzot, to review the case.

The congresswoman has called the police response "brutal.'' She has said the incident points to the need for de-escalation training for DeSoto police and the creation of a citizen review panel to examine police actions.

DeSoto Police Chief Joseph Costa has publicly maintained for months that his officers did nothing wrong - even before his internal affairs office concluded its inquiry into the brutality complaint.

As for the DA’s decision to not prosecute the brothers, he said, “this happens all the time with many other cases. Only she (Johnson) can tell you why she decided not to prosecute these particular cases.’’

In August, Anderson called 911 while trying to stop an argument between Grant and her oldest son, Matt Bateman. A family friend also called 911 and told a dispatcher she thought Bateman had picked up a sledgehammer, records show.

By the time police arrived, Anderson had quelled the dispute. Grant was behind the wheel of his car getting ready to leave.

A neighbor told The News after the incident that police officers had swept in with weapons drawn.

The footage showed that a quiet scene erupted into chaos after six officers started ordering four family members on the ground to be handcuffed. Costa said the order was necessary because officers believed someone could be lurking nearby with a weapon.

Members of the family complied, but then objected because the argument was over. Anderson implored officers to not shoot her sons.

An officer approached Grant when he was on the ground and said, “You need to calm down or you’ll be tased.’’ Then officers tased him as he squirmed and screamed. He suffered scrapes and a hemorrhage to his eye that he believes was caused by the officers’ force.

Police arrested Grant and Sam and took them to jail.

At the county lockup, Grant and Sam kept to themselves.

"I had never been to jail before, so it was very scary," Grant said. "You're sitting in the jail cell and one minute feels like 30 minutes and 30 minutes feel like three hours. You're just sitting in there and looking at walls and thinking about how stuff could have gone differently.’’