ANNA, Texas — UPDATE [Mar. 12] — Three teens have been arrested and charged with robbery in connection with a drug-deal-gone-bad that left a 15-year-old McKinney teen dead.

On Tuesday morning, Anna police arrested 17-year-old Marcos Hernandez of Anna, 18-year-old Mario Garcia, and an unnamed juvenile from McKinney on robbery charges, a second-degree felony.

Police say the four teens had set up a meeting with 18-year-old Lamarr Sterkes to purchase marijuana — all intent on robbing Sterkes.

According to an arrest warrant affidavit, the marijuana transaction and subsequent robbery occurred in Garcia's vehicle and, at some point during the altercation, Sterkes drew a gun, and was forced out of the vehicle. Then, Sterkes is alleged to have fired into the vehicle — fatally striking 15-year-old Alejandro Camacho.

Police say the transaction involved less than one ounce of marijuana.

ORIGINAL [Mar. 10] — An 18-year-old Anna resident was arrested early Sunday morning in connection with the murder of a 15-year-old McKinney teen in what police say was a drug deal gone bad over a "small amount of marijuana."

Around 2:30 p.m., on Friday, March 8, 2019, the Anna Police Department was notified of a shooting in their city after 15-year-old Alejandro Camacho, of McKinney, was left in the parking lot of Medical City McKinney suffering from a gunshot wound to the chest.He would later die as a result of these injuries.

Investigators had determined that Camacho, 18-year-old Christopher Lamarr Sterkes of Anna, and three other males were involved in a drug deal near the intersection of Wylie Farm Road and Creekview Drive in Anna.

All five individuals were in a vehicle when the alleged drug deal turned bad and a fight broke-out inside of the vehicle.

"Sterkes exited the vehicle and fired multiple shots toward the vehicle as the driver attempted to flee the scene," stated the Anna Police Department.

One of those rounds struck Camacho in the chest.

"It's sad that a 15-year-old boy lost his life over a small amount of marijuana," stated Anna Police Department Chief Jeff Caponera. "We want to express our deepest condolences to the Camacha family, this is an unfortunate tragedy and want to assure his parents we will do what we can to ensure justice is served."

The McKinney Police Department, Texas Rangers, and Collin County Sherrif's Office aided in the investigation.

"This was a coordinated effort between multiple agencies that led to the swift arrest of a dangerous criminal," stated Caponera.