A civil rights lawsuit was filed Thursday against a white Lansing police officer captured on video June 24 pinning and threatening a black teenager.

The suit claims that officer William Mason’s actions were without “lawful justification” and 15-year-old Jordan Brunson never posed a threat. The suit, which also names the village of Lansing, was filed on behalf of Brunson and his family.

Filed in federal court, the suit claims Brunson “suffered and continues to suffer, among other things, bodily injury, pain, suffering, severe mental and emotional distress, fear, anguish, humiliation.”

“This is yet another case of a police officer using excessive and unreasonable force,” said Andrew M. Stroth, Brunson’s attorney. “The video speaks for itself, and Jordan’s family wants the lawsuit to send a message to the village of Lansing.”

Matthew Welch, an attorney for Lansing, said he had no comment, adding that his law office had just received the suit.

Lansing officials and Mason could not be reached for comment.

According to Lansing police, Mason’s contact with Brunson, 15, started after a caller told a police dispatcher about 3:45 p.m. June 24 that about 30 juveniles were fighting near the officer’s home.

Brunson was near the incident but was not part of it, Stroth said.

The fight ended before officers arrived, according to the police statement. But officials said they saw about 30 juveniles in the area. A 12-year-old black boy told officers he also was in the area when a white teen gave him a beverage that might have contained drugs, the report said.

Eventually, the 12-year-old’s older brother had a “physical altercation” that resulted in a white male being repeatedly struck in the face, police said.

Officials added that Mason, who was off-duty, told them he discovered a backpack containing “a baseball hat and a realistic-looking BB gun” in his backyard.

Mason eventually encountered the white teen who was bleeding from his face, police said.

Brunson, who said the teen is one of his best friends, approached them to check on the injured teen as he spoke with the officer on his front lawn. As he and the other youth began to leave the officer’s home, Brunson said the man told the boys to halt, but they didn’t.

Mason then pinned Brunson to the ground during the incident that was captured on video and posted to social media, Brunson said. At one point, the video shows, the officer threatened to kill him.

Lansing Mayor Patricia Eidam said she wants the Cook County sheriff’s office to investigate the incident. Cara Smith, the chief policy officer for the office, said the sheriff’s office is still reviewing Eidam’s request.

In a police report obtained by the Daily Southtown, Mason said he saw the injured white teen and sat him on his front porch after the teen asked him for help. The teen also told him that he “jokingly” said to a friend that he put Xanax in the 12-year-old’s drink, which then led to the physical altercation.

Mason added that a black male, who was Brunson, began “running towards us in an aggressive manner.” After telling the teens that police were arriving and they should stay on his property, the officer said Brunson stated that he and the white teen were going to leave.

Mason said he told the boys again to stay. He said after that moment, the teen “started to come at me, in an aggressive manner, like he was going to strike me and came very close to me.”

“Fearing the male black would attack me and I was unsure if he had any weapons, I grabbed him in the middle of his sweatshirt and pulled him on the ground,” Mason recalled.

He said he continued to detain the teen until officers arrived. Mason was placed on administrative leave after the incident. Officials refused to say whether Mason has returned to his job.

gporterjr@tronc.com