On", Cash claimed she was treated for cancer after being exposed to the "radioactive UFO". The Landrums' health was somewhat better, though reportedly both suffered from lingering weakness, skin sores and hair loss. Cash later developed breast cancer and Landrum severe cataracts. A radiologist who examined the witnesses' medical records for MUFON wrote, "We have strong evidence that these patients have suffered secondary damage to ionizing radiation. It is also possible that there was an infrared component as well." (quoted in Clark, 176) However, Brad Sparks contends that, although the symptoms were somewhat similar to those caused by ionizing radiation, the rapidity of onset was only consistent with a massive dose that would have meant certain death in a few days. Since all of the victims lived for years after the incident, Sparks suggests the cause of the symptoms was some kind of chemical contamination, presumably by an aerosol. Other claims Investigators later located a Dayton police officer, Detective Lamar Walker, and his wife who claimed to have seen 12 Chinook-type helicopters near the same area in which the Cash–Landrum event allegedly occurred and at roughly the same time. These other witnesses did not report seeing a large diamond-shaped object. One day in April 1981, a CH-47 helicopter flew into Dayton. As Colby watched, he became very upset. Landrum decided to take him to the spot where the helicopter had landed with the hope that it would seem less frightening on the ground. When they reached the landing zone, they found a lot of people there already and had to wait some time before they were allowed to go inside the helicopter and talk to the pilot. Landrum and another visitor both claimed that the pilot said he had been in the area before for the purpose of checking on a UFO in trouble near Huffman. When Landrum told the pilot how glad she was to see him, because she had been one of the people burned by the UFO, he refused to talk to them further and hustled them out of the aircraft. Aftermath Legal action Eventually, Cash and Landrum contacted their U.S. Senators, Lloyd Bentsen and John Tower, who suggested that the witnesses file a complaint with the Judge Advocate Claims office at Bergstrom Air Force Base. In August 1981, Cash, Landrum, and Colby were interviewed at length by personnel at Bergstrom Air Force Base, and were told