Greg Valdez said his father found out that the federal government conducted the cattle mutilations to determine the effects of radiation from Gasbuggy.
"They were testing the cattle to avoid panicking the public," he said. "They were also testing advanced aircraft from a nearby off-site air base. The aircraft was invisible and silent and used optic camouflage. The technology has since been declassified."
Greg Valdez alleges that several government agencies and military entities, such as the U.S. Air Force, were heavily involved in the cover-up. He says that the CIA and National Security Agency also became involved when Albuquerque businessman Paul Bennewitz discovered evidence of secret military projects on the Kirtland Air Force Base, which also had ties to Dulce.
To protect the secrecy of their operations, Gabe Valdez learned that the government started a disinformation campaign and encouraged rumors about UFOs and aliens, said Greg Valdez.
By 1979, when the government realized Gabe Valdez had discovered the truth about who was behind the strange happenings, they began monitoring him, his son said. He said the family found hidden listening devices in their home.
Aztec resident Brooks Marshall is a UFO enthusiast and local paranormal expert. Marshall has followed reports of the supposed Dulce underground base for years and has attended many symposiums and lectures on the issue.
Marshall believes there is truth to a secret military presence centered around Dulce. But he doesn't think government involvement comes close to explaining the cattle mutilations.
"From early on, the mutilations indicated a technology that we just didn't have," he said. "There was a complete absence of blood, and the incisions looked like microsurgery and laser technology had been used -- technology humans didn't have at the time. Plus, there were no tracks, and other animals -- even predators -- would avoid the carcasses, which also looked like they had been dropped from a very high distance. Many of the bones would be broken."
Marshall said specific organs, like the tongue and reproductive organs, were removed from the cattle. The mutilations still periodically occur, he said.
From his research, Marshall concludes there are two pieces to the Dulce mystery: the cattle mutilations, which he says remain unexplainable, and the government activity.
"It's my opinion that there was an extremely large underground military base," he said. "There's evidence that there was strong military activity there. One theory is that this base housed aliens."
Marshall, who once worked for El Paso Natural Gas, is familiar with the Gasbuggy Project and said he worked with employees who were directly involved with it. While he believe there have been disinformation campaigns conducted by the military to deflect attention from a possible underground base, he doesn't find credence in the theory that the cattle mutilations were the result of government tests for radioactive effects.
"It doesn't make sense that the government would test cattle in that way," he said. "All they'd have to do to test radiation levels is to walk up to the cow with a Geiger counter."
(Wikipedia) Dulce Base is an alleged secret alien underground facility under Archuleta Mesa on the Colorado-New Mexico border near the town of Dulce, New Mexico in the United States. Claims of alien activity there first arose from Albuquerque businessman Paul Bennewitz.
Starting in 1979, Bennewitz became convinced he was intercepting electronic communications from alien spacecraft and installations outside of Albuquerque. By the 1980s he believed he had discovered an underground base near Dulce.
The story spread rapidly within the UFO community and by 1990, UFOlogist John Lear claimed he had independent confirmations of the base's existence.
Political scientist Michael Barkun writes that Cold War underground missile installations in the area gave superficial plausibility to the rumors, making the Dulce base story an "attractive legend" within UFOlogy.
According to Barkun, claims about experiments on abductees and firefights between aliens and the Delta Force place the Dulce legend "well outside even the most far-fetched reports of secret underground bases."