A man suspected of shooting four people dead in a Colorado home was arrested in Mexico over the weekend, according to police.
Joseph Mario Castorena, 21, had been on the run since the adults were found dead in a home in Aurora in the early hours on October 30, the Aurora Police Department said.
In a news release on Monday, the police department confirmed Castorena had been arrested in Aguascalientes, a state in north-central Mexico, on Saturday.
Castorena is suspected of shooting the four adults inside a home near the intersection of 10th Avenue and Geneva Street.
The four were Jesus Serrano, 51; his daughter Maria Anita Serrano, 22; her husband Kenneth Eugene Green Luque, 20, and Rudolfo Salgado Perez, 49, who was renting a space in the home.
The police department said responding officers had rescued a woman and two young children, unharmed, from the home.
The children were not related to the woman or the suspect, but police said investigators determined "the incident stemmed from an ongoing domestic situation between the surviving woman and the suspect."
Castorena had been on the run since the shooting, but police on Monday said investigators had worked with the FBI, local police officers in Mexico, Mexico's immigration enforcement agency and the Mexican government to apprehend him.
He was flown to the U.S. on Sunday and booked into a Maricopa County Sheriff's Office detention center in Phoenix. Police said it was not known when he would be transferred to Colorado.
"The arrest of Joseph Castorena should serve as an example that the dedicated men and women of the Aurora Police Department never quit on a case until those responsible are in custody," the Aurora Police Department's interim police chief Art Acevedo said in a statement.
"I would like to thank our federal partners at the FBI and our law enforcement partners in Mexico for teaming up on the arrest.
"We hope this announcement helps bring family and friends of the victims a little closer to the closure they deserve."
On November 4 police arrested Castorena's 18-year-old brother, Juan Angel Castorena, in Denver.
He is facing a charge of accessory after the fact, first-degree murder.
Police at the time said they had no evidence indicating that Juan Angel Castorena was involved in the October 30 shooting.
On November 10, police arrested Castorena's cousin, Carlos Casillas-Flores, 22.
Police said they had no evidence indicating that Casillas-Flores was directly involved in the shooting but said investigators determined that he assisted Castorena in avoiding apprehension.
The Aurora Police Department have been contacted for further comment.
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