4-year-old found shot dead after a gun was left in bedroom, investigators say. Victim's brother, another man arrested.

In February, a 4-year-old was shot and killed. Now, his brother and another man face criminal charges, prosecutors said.

Coatesville, Pennsylvania first responders were called to a home on Feb. 28 for a report of a child shot in the head, according to the Chester County District Attorney’s Office. The 4-year-old was pronounced dead at the scene.

Police found a pistol lying next to the victim on the floor inside Victor Lara-Ortiz’s bedroom, according to prosecutors. Lara-Ortiz was the brother of the victim.

A search found one spent shell casing in the gun.

Investigators said Lara-Ortiz left the loaded gun on a table in the bedroom with the door open when he left. Lara-Ortiz was not home when his brother sot himself, prosecutors said.

Police traced the gun and determined it was sold to William Thomas from a gun shop on Feb. 15. Thomas was not allowed to have a gun because he was previously convicted, but he lied on his application, prosecutors noted.

Thomas transferred the gun to Lara-Ortiz the same day he bought it, prosecutors said.

Lara-Ortiz was charged with involuntary manslaughter, firearms not to be carried without a license, endangering the welfare of a child and other offenses. Thomas was charged with illegally and transferring a firearm, delivery of firearm to a minor and attempted purchase of an illegal firearm.