Editor's note: This article has been updated throughout.

Arrest affidavits released Tuesday by the Grayson County District Attorney’s Office reveal new details of the fatal shooting of a 5-year-old Denison boy on Sunday, including the search for a third suspect and a botched drug deal that authorities say led to the shooting.

The District Attorney’s Office said Antonio “Chapo” Prado, 17, is wanted for capital murder of a child under 10 years of age. Denison Police arrested Ryan Clay, 18, and Sabrina Nino, 17, both of Sherman, on Monday on the same charges.

Shortly after 11 p.m. Sunday, Denison Police responded to a report of a “drive-by” shooting outside a home in the 1700 block of West Elm Street. When officers arrived, they found that two brothers, Kason Powell, 5, and ZaQuavian Fisher, 11, had been struck by the gunfire. Powell was taken to Texoma Medical Center where he later died, and Fisher was flown by air ambulance to a Dallas-area hospital and placed in an intensive care unit. Denison Police Department Lt. Mike Eppler said Fisher was in stable condition Monday but had no updates on his condition Tuesday. The affidavits indicate that multiple people resided at the home, but it was unclear who was inside the residence when the shooting began.

According to the affidavits, Fisher’s 17-year-old brother told investigators that on the night of Nov. 19, he and some friends arranged to purchase a quarter ounce of marijuana from Sabrina Nino in the parking lot of the Sherman Walmart. Fisher’s 17-year-old brother said a female friend drove a vehicle to the parking lot and the group remained there until Nino arrived.

The affidavit states Nino approached the driver’s side window and when she showed the marijuana, the female driver of the vehicle with Fisher’s 17-year-old brother took it and began driving off with Nino holding on to the vehicle. Fisher’s 17-year-old brother indicated the driver then stopped the vehicle, got out and hit Nino.

During a noncustodial interview at her residence on Monday, Nino told investigators that she obtained the marijuana from Prado and returned to his residence after she was “jacked.” Nino said she then got in a car with Prado, Clay and another man who was not named in the affidavit and the group drove to Powell’s home so that Nino could fight the driver of the vehicle and possibly get her money or drugs back.

Nino said after they arrived at the residence, she exited the car and tried to locate those who had stolen the drugs from her. As she walked back to the vehicle, she said someone began to fire rounds into the house. She then reported that Clay drove the group back to Prado’s house.

In a phone call placed to Denison detectives Monday, Nino told detectives both Clay and Prado opened fire on the house. According to the affidavit “there were multiple holes in the front of the residence” and there were also “multiple used shell casings found in the street in front of the house from a 9 mm firearm.” Nino told investigators that she had driven the group to the home and noticed a handgun in Clay’s waistband, before their departure.

Prado remained at large Tuesday night and is considered to be armed and dangerous. Clay and Nino were booked into the Grayson County Jail on Monday, where they each remained Tuesday on a $1 million bond. It was unclear whether police had identified the fourth man Nino reported present at the shooting or if they intended to file charges against him.

At least two pages on the crowdfunding site Go Fund Me have been established in the names of the victims or their families.

The Denison Police Department said members of the public with knowledge of the shooting or Prado’s whereabouts are encouraged to call the department at 903-465-2422.