BRIDGETON, Mo — The Major Case Squad is talking about the two people charged with killing a 15-year-old boy. Last Saturday night, an illegal “slide show” in Bridgeton resulted in the teen’s shooting. Police say the show involved dozens of people and at least 100 cars driven erratically.

A day following the announcement of two arrests, investigators from the Major Case Squad detailed the chaos that broke out during a weekend illegal car show.

It had started in Bridgeton and spilled over to parts  of St. Louis County.  Chief Mark Mossotti of the Bridgeton Police Department says, “The slide show is an advertisement that they were putting out on social media, and it’s where they gather in large groups and take these high-performance cars and do donuts, smoking a tire,  hanging out, and other lawless activity.”

Police shoot, kill suspected truck thief after chase in Jefferson County

Police say the event led to gunfire. They say people started shooting at them when they tried to break up the event around 8:30 p.m. Saturday night. 100 vehicles were  driving recklessly on the Earth City Expressway. Police said the shots hit multiple people, including Geraldo Perez, who later died.

Officer Scott Stephens says, “Witness directed police to Garron Stevenson  as a passenger in the Honda firing weapon. In an interview, Stevenson admitted to firing  the  AR 15 times that night . A search of his residence uncovered  the weapon hidden inside a wall inside his residence. The shell casing and the weapon recovered were confirmed to be the same.”

Stevenson faces charges for second-degree murder, unlawful use of a weapon, assault, and armed criminal action. They also charge a 17-year-old with second-degree murder.

Prosecuting Attorney Wesley Bell  says: “Our thoughts and prayers  in pursuit of justice  are with and for  this family; it’s for the entire community but also for the families and loved ones of victims of violence  that we seek to hold defendants  accountable for violent crimes.”

Detectives say this is an ongoing investigation, and they encourage anyone with information to contact Crimestoppers at 866-371-8477. You will remain anonymous and possibly receive an award.