Now the FBI has released more than classification "Vault" files, which are to reveal how the White House has sent panicked cows suspected of alien mutilation.
More than 8000 head of cattle captured Mystery aircraft, mutilated, then the sky fell to the American Southwest in the late 1970s, officials have told their leaders.
Terrified farmers in New Mexico, Colorado and Nebraska were afraid it would be separated from each other are extraterrestrial flying saucers.
Details of the probe are detailed in the memos released by the FBI on its website vault.fbi.gov
Cattle killer took sick trophies, including languages, lower lips, genitals, ears and eyes. In some cases, convicted of the animal was completely emptied of its blood.
An investigator explained his theory: "These animals are supported by air, mutilated and elsewhere came back and dropped from aircraft.
"Same multilations occurred throughout the Southwest. Whoever is responsible, is well organized with the technology, funding limits and with secrecy."
In January 1979, after U.S. Attorney General Griffin Bell, wrote Senator Harrison Schmitt, frightened, said: "The documents sent to me to indicate one of the strangest phenomena in my memory."
Mr. Schmitt has represented New Mexico - where, from 1976 to 1978, there were many incidents in a mysterious Dulce ranch.
A detailed report of the police feared an exotic cooling sacrifice .. "This bull of 11 months was abandoned by a particular type of aircraft north of the ranch house of Manuel Gómez sexual organs had been removed with a sharp instrument and accurate bone had been removed.
"Taurus visible bruises around his chest seems to indicate that a strap was used to raise and lower animals of the plane ... the flesh under the skin was reddish.
"A likely explanation for the blood rose is a control type of radiation used to kill animals ... the liver and heart have been boiled. The two bodies have the texture and consistency of peanut butter."
The bull had been seen alive the previous day, but during the night a low-flying spacecraft were heard near where the remains were found.
FBI agents were sent to remote areas through rural America, probe the murders.
A police report from a second incident in the courtyard of Dulce, dated June 13, 1976, recounted how a strange craft visited another animal mutilation.
"A sort of suspect aircraft landed twice, leaving three cloves mark in a triangular shape. Diameter of each module was 14inches."
The FBI document dated January 1979, said: "The Justice Department informed that the criminal police was aware of the phenomenon of animals mutilated in a way that shows such action was presented as part of the ritual of persons or ceremony."
Kenneth Rommel, who led the probe FBI's Animal Mutilation Project, wrote a bomb March 5, 1980 memo to one of the dive alien.
He said: "In July 1978, the UFO was reportedly found the population in Taos, New Mexico, swinging pick-up the next morning, the flakes of powder were reportedly recovered from the roof of the car .."
Local FBI agents said that the flakes became a cow hides, he added.
