(Reuters) — A legal team including prominent civil rights lawyer Benjamin Crump said Tuesday it has filed a lawsuit on behalf of a father whose 9-year-old son is in a medically induced coma after being trampled at the Astroworld festival in Houston.

The boy, identified in a statement by Crump only as “E.B.,” sustained life-threatening injuries at a weekend performance headlined by Travis Scott that ended with eight people killed and dozens more injured in a stampede.

“This little boy is currently fighting for his life, and his parents will never know the same child they entered Astroworld with,” Crump said in a statement.

The lawsuit, which names Scott, Live Nation Entertainment, Scoremore Mgmt. and Cactus Jack Records as defendants, alleges negligence in “a great number of aspects” including crowd control and failure to provide proper medical attention.

It also accuses the defendants of failing to stop the hip-hop star’s performance “until over 40 minutes” after officials declared a mass casualty event had begun.

Ezra Blount, 9, was on his father’s shoulder at the event before falling during the crush.

Once the family was able to locate him at Texas Children’s Hospital, the boy was in a coma to fight the brain trauma.

Houston’s police chief said he met briefly with Scott to voice his “public safety concerns” before the rapper took the stage. Friday’s deadly crowd surge has led to a flurry of lawsuits on behalf of concert-goers, while police are pursing a criminal probe of the tragedy.

The eight fans who lost their lives ranged in age from 14 to 27 and included a high school baseball player, a high school band member who loved to dance and several college students from across the country.

The victims were crushed in a surge of fans near the stage at NRG Park at around 9:30 p.m., with some unable to breathe and others trampled underfoot. Hundreds of others in the sellout crowd of 50,000 were injured throughout the day.

Fans described a chaotic scene after a steady escalation of disruptive behavior over several hours.

Scott, who said he was “devastated” by the events, announced on Monday he would cover all funeral costs and offer aid to those affected. He is also working with law enforcement and city officials to “respectfully and appropriately connect” with victims and their families, according to a statement.

Drake, who made an appearance at Astroworld with Scott, said in an Instagram statement on Monday night his heart was “broken for the families and friends of those who lost their lives and for anyone who is suffering.”

More than a dozen lawsuits from victims and their families have already been filed against several defendants, including Scott and concert promoters Live Nation Entertainment Inc and ScoreMore.

The lawsuits generally accuse Live Nation of acting negligently by failing to create and enforce sufficient safety protocols, failing to provide adequate security and failing to maintain proper crowd control.

Live Nation issued a statement on Monday saying the company “would address all legal matters at the appropriate time.” Scott’s representatives declined comment on civil suits filed.