Two brothers allegedly beat stepfather to death claiming he abused sister

Police say that beaten stepfather had warrant issued for sexual abuse of another child

Three teenagers face charges in the death of a 42-year-old man accused of inappropriately touching the half-sister of two of the teens.

Brothers Alexandro and Christian Trevino, 18 and 17 years old, are thought to have beaten their stepfather, Gabriel Quintanilla, 42, to death after he allegedly abused their half-sister, according to police in Pharr, Texas.

Juan Eduardo Melendez, 18, has also been arrested in connection to the case.

The body of Mr Quintanilla was found by a farmer who informed law enforcement, with officers from the McCallen Police Department arriving shortly before 3pm on Thursday. The Pharr Police Department took on the case the following day.

Mr Quintanilla bore signs of severe trauma and had been beaten with brass knuckles, MyRGV News reported.

His nine-year-old daughter notified someone on 20 January that he had touched her inappropriately. Police have said that Mr Quintanilla already had been issued a warrant for abusing another child.

During a press briefing on 23 January, Pharr Police Deputy Chief Juan Gonzalez said that “when the brothers Alexandro and Christian found out, they confronted Gabriel at the residents, and a physical fight ensued between the three”.

“Quintanilla left the location on foot ... Christian Trevino runs out after the victim and finds him outside of an apartment complex further south down the road,” he added.

“A second assault occurs there and Alexandro Trevino and the driver of a red Dodge Charger, who we have identified as Juan Gonzalez Melendez, catch up to him and again join in on an assault of the victim at that point,” Mr Gonzalez said.

The teenagers left the scene and changed vehicles, and again looked for Mr Quintanilla, finding him walking alone along a road. That’s when police say a third assault took place and Mr Quintanilla was placed in the back of a truck, a white Ford F-150, still alive.

The suspects then drove to an area in McCallen, where Mr Quintanilla was left in a field. The authorities have said that they believe he was still alive at that point. The three teens fled the area after leaving Mr Quintanilla.

The suspects were arraigned on Sunday. Christian Trevino and Mr Melendez have been charged with capital murder, aggravated assault, and engaging in organized criminal activity. It’s unclear if they have retained lawyers to speak on their behalf.

Alexandro Trevino has been charged with aggravated assault and engaging in organised criminal activity.

The bond for all three suspects has been set at $500,000, according to ValleyCentral.