Chilean Freddy Aguilera-Zamora confessed to Denver detectives that he killed his girlfriend, Britt Mackay, in late May after she began seeing other men, a detective said in court documents filed in Denver.
“Aguilera-Zamora stated several times that he was guilty for the death of his girlfriend,” Denver Detective Michael Martinez wrote about an interview Aguilera-Zamora gave at Denver Health Medical Center after a suicide attempt. “Aguilera-Zamora stated that ‘my girlfriend went out on me.”‘
Aguilera-Zamora, 31, told detectives that he stabbed Mackay and then used a belt and his hands to strangle her. A knife and a belt with a loop were found next to her body.
He is charged with first-degree murder.
Martinez said that an autopsy showed the 26-year-old Mackay had 31 stab wounds and 20 other cuts on her chest, back, throat and arms.
Mackay was found dead by Denver police May 23 after they discovered Aguilar-Zamora suffering from multiple stab wounds on his chest and slash marks on his wrist. He was in an apartment near East Warren Avenue and South Marion Street.
In his back pants pocket they found a card with Mackay’s name on it. Using a computer in his patrol car, Officer Marcus Vigil was able to locate Mackay’s address on South Josephine Street. There, investigators found Mackay face up with blood on her face and her body partially wrapped in a blanket.
Martinez said Aguilera-Zamora claimed that Mackay tried to stab him in the chest. He said he took the knife away from her, stabbed her in the upper chest and then saw her take her last breath.
A close friend of Mackay told police that Mackay and Aguilera-Zamora lived together but had relationship problems. At one point, Aguilera Zamora moved out but later moved back in.
The friend said Mackay told her she let Aguilera-Zamora move back in because she wanted him to pay the rent. However, the woman said the Chilean told her he was moving back out because Mackay was seeing another man, according to Martinez.
Another former Aguilera-Zamora girlfriend said Aguilera-Zamora crossed the Mexican border into the United States illegally in December 2004. She claimed that when she broke up with him, he climbed onto her apartment’s second-floor balcony and pounded on the window, scaring her. He was arrested but failed to appear in court.
Staff writer Howard Pankratz can be reached at 303-954-1939 or hpankratz@denverpost.com.



