Fort Worth police are investigating a deadly stabbing that happened across the street from Polytechnic High School on Friday afternoon.

Family said 15-year-old Jacob De La Rosa was stabbed to death and his father was critically injured.

According to Fort Worth police, officers were called to a stabbing/cutting call in the 2700 block of E. Rosedale Street at 3:44 p.m. Friday. When officers arrived, everyone involved was gone. Once police tracked down the other party, a juvenile admitted to stabbing people in self-defense.

As of Saturday night, Fort Worth police said no charges had been filed and the investigation remained open. The information would be provided to the Tarrant County District Attorney’s Office for review, said police.

Mother Janet De La Rosa told NBC 5 her son called on Friday asking to pick up him and his brothers early from school. She said Jacob was worried about threats being made by other teens.

When her husband went to pick up the boys across the street from campus, there was an altercation.

She said she received a phone call where she could hear nothing but chaos.

Then, another call saying Jacob was dying as his father drove to the hospital.

“He was the sweetest, sweetest child anybody can have,” cried De La Rosa. “They punctured his heart. There was no saving him.”

She said in the chaos, her husband was unaware he had been stabbed, too.

She said doctors pronounced Jacob deceased at the hospital and rushed her husband into surgery with a stab wound to his spleen.

Her husband remains hospitalized in the ICU.

De La Rosa said she wants those responsible arrested.

She described Jacob as a teddy bear.

“He gave the warmest and tightest hugs,” she said.  

She said that out of her six children, Jacob was the one who would most often come into her room just to say how much he loved her.

“We’re left here with broken pieces trying to figure out the puzzle of what to do next,” she said.

Loved ones created a GoFundMe to raise money to cover funeral and hospital expenses.