A quadruple shooting Sunday night in the San Luis Valley, which left two men and a woman dead, happened during an alcohol-fueled birthday celebration that began at a small-town bar and ended in a bloody scene at a nearby home, according to an arrest affidavit.

The suspected gunman, 25-year-old Santos Navares, told investigators he had no memory of his alleged rampage in Conejos County, the affidavit says.

Authorities say Navares was found in a vehicle stuck in the snow, intoxicated and with a .22-caliber handgun in his waist, not long after the shootings. “I will blow you (expletive) away,” he allegedly told arresting officers.

The shootings happened about 6 p.m. Sunday night at a home just outside of the townsite of Capulin near the New Mexico border. The affidavit shows an arriving sheriff’s deputy found a grisly scene of four people with gunshot wounds scattered around the house.

Jose M. Archuleta, 54, was discovered first sitting in a running Ford Thunderbird and dead from a gunshot wound to the head. Guadalupe Cervantes — the 57-year-old homeowner whose birthday the group was celebrating — was then found nearby with a gunshot wound to the head. Cervantes died after officers started performing CPR.

Don L. Martinez, 34, was found — after officers heard screaming from a nearby field — with a gunshot wound to the chest. Authorities then discovered 30-year-old Marissa Herrera mortally wounded with a gunshot to her head. She was on the ground under a blanket next to the Thunderbird and barely breathing.

Navares is suspected of 11 counts in the shootings, including six first-degree murder charges, and court records show he has been assigned public defenders. He is next due in court on Jan. 30 to be formally advised of the case against him.

The trouble began on Sunday night after Navares encountered several of his victims at a bar in Capulin as they were celebrating Guadalupe Cervantes’ birthday, according to the affidavit.

“Santos was buying drinks for everyone, paying for them out of a huge wad of cash, and became increasingly aggressive,” the affidavit says, recounting what a witness told investigators. “Santos had asked Marissa out several times and became very aggressive when Marissa told him no.”

Eventually, according to the affidavit, the bartender wanted to get Santos out of the bar, at which point Cervantes convinced him to come to his home. They then got into Santos’ van.

“While in the bar parking lot, Santos pulled a gray-colored handgun from the console and pointed it at (the witness’) head,” the affidavit says. “(The witness) got out of the vehicle and Guadalupe convinced her to get back in and they went to Guadalupe’s house.”

The affidavit does not say what investigators believe prompted the eventual shootings.

When investigators interviewed Santos, he recounted the events before and after the shootings, the affidavit says, but claimed to have no memory of the time between leaving the bar and his arrest.

Archuleta and Cervantes were pronounced dead at the scene of the shooting. The affidavit says Herrera died at St. Anthony Hospital in Lakewood after being taken off life support.