EL PASO, Texas -

There are new details on an El Paso murder investigation that began as a missing persons case.

Police arrested two men on Monday during a SWAT standoff at a home located on the 8900 block of Ortega Court in El Paso.

ABC 7 has obtained court documents containing grisly details about the murder from witnesses.

Anthony Trejo was reported missing around Sept. 12. The disappearance of the 33-year-old was a mystery until El Paso police said they got an unexpected break during a SWAT situation involving unrelated criminal warrants.

The suspects are identified as 33-year-old Roberto Favela and 41-year-old Romuldo Trujillo.    

Detectives said they found evidence at the home that linked both men to Trejos' death. Their mugshots are not yet being released.

According to court document investigators talked to three witnesses. One of the witnesses reported to El Paso police Favela allegedly admitted to murdering Trejo.

The witness says Favela hit Trejo in the head with a metal dumbbell.

A second witness reported seeing Trejo being assaulted by Favela, Trujillo and a third man. The victim was reportedly wrapped in a cloth, bound with electrical wires, taken and dumped in Mexico.

A third witness reported seeing Trejo being stepped on. The witness saw blood on the carpet afterwards that was allegedly cleaned up by the defendants.

According to investigators, Favela was wearing the victim's watch at the time of his arrest.

Witnesses expressed concerns of retaliation by the defendants because Favela has been known to carry and threaten people with a machete and has possible connections to drug trafficking organizations.

Police said a forensic investigation by the crime scene unit yielded evidence that led to both Favela and Trujillo being charged with murder. The men were booked into the El Paso County Detention Facility under $2 million bail.

Favela was also booked on a warrant for engaging in organized criminal activity and aggravated assault with a deadly weapon, police said.

Trujillo was also booked on a warrant for anauthorized use of a motor vehicle.