Snapchat Stabbing: Dramatic 911 Call Tells How Mom Found Victim

A teen fatally stabbed another boy for texting the teen's girlfriend.

— -- The harrowing 911 call recording has been released detailing the dramatic moments in which the mother of a teenage girl grapples with the discovery that her daughter's boyfriend allegedly stabbed another boy.

The South Carolina mother is heard frantically telling a 911 dispatcher how she is trying to reassure the bloodied victim, identified by police as Lucas Cavanaugh, while she still fears that the attacker is in her house.

"He's in the house, he's somewhere. He's my daughter's boyfriend," the woman says on the recording, released by authorities on Tuesday. She identified herself to police and gave the dispatcher the address of her home, outside of which the stabbing allegedly happened. ABC News is choosing not to release that information.

"He's got a pulse and he is breathing but he's completely unconscious," the woman says. "He has been stabbed right in his stomach."

The 8-minute call is highly-charged, and the dispatcher regularly has to urge the mother to remain calm and focused. ABC News is withholding the name of the mother to maintain the anonymity of her daughter.

At one point, she says that she will have trouble applying pressure to the wound because of the serious nature of his injuries.

Cavanaugh, 17, later died, authorities said.

Mount Pleasant Police Department documents describe how the fatal altercation occurred after the suspect, Matt Fischer, became upset when he saw a Snapchat that Cavanaugh sent to Fischer's girlfriend.

The affidavit states that Cavanaugh "was contacting the defendant's [Fischer's] girlfriend via Snapchat on her iPod. The defendant took the iPod and contacted the victim. Words were exchanged at which point the defendant told the victim 'Come over' and 'I'll kill you man.'"

The police report also describes how Fischer, 16, who allegedly stabbed Cavanaugh immediately outside the house, ran back into his girlfriend's house "with the bloody knife," left it there, and then fled on foot.

A firefighter on the scene told the responding police officer that Fischer's mother arrived at the scene saying that she had received a phone call from her son, picked him up in the area and brought him back to the house.

"She stated that she did not know what happened, but that she had the subject in her vehicle," the report stated.

Police forced him out of the car at gunpoint and took him into custody, the report stated.

Fischer is being charged on the counts of murder and possession of a knife during the commission of a violent crime, according to the County of Charleston's affidavit.

Fischer is being charged as an adult and he was denied bond Monday, according to the Associated Press.

Both families were in court for Monday's bond hearing, The Post and Courier reported. Neither family spoke but Cavanaugh's father cried as he stood next to a detective, the newspaper reported.

Fischer's attorney, Peter David Brown, spoke on behalf of his client.

"This is just a tragedy for the entire Wando community and the families involved," Brown said, according to the newspaper.

Brown could not be immediately reached by ABC News for comment.