On 31 July 1952, George J. Stock said he photographed a domed, disc-like object over Passaic, New Jersey, while his father William watched. Publicity initially credited the pictures to John Riley, who developed the film. The Air Force investigation corrected that attribution, collected photographs and negatives, checked possible local sources and questioned the account’s scale and lack of independent witnesses. A released file summary says the photographs were never proved to be a hoax, while setting out reasons for doubt.
The account Stock gave investigators
Special Agent George H. Wertz interviewed Stock at Passaic on 19 November 1952. Stock placed the original observation at about ten in the morning on 31 July. He said he noticed a symmetrical, domed object apparently stationary to the east, went indoors for a camera and called his father. On their return to the yard, he said, it had moved nearer. William subsequently confirmed his son’s account to the investigator from that point onwards.
The object was described as thin at the edge, thicker towards the centre and topped by a dome. Stock said it moved slowly from east to west, hovered almost overhead, then moved north, paused and tipped onto an edge. He described a complete turn while tilted, followed by a slow northward departure. A vapour-like rim reportedly developed around the edge without trailing behind it. These movements are the witnesses’ account, not a trajectory independently measured from several observing positions.
Stock estimated very low speeds, initially no more than about five miles per hour and later ten to fifteen. The investigative sketch records estimates of sixty to eighty feet across and about eight feet high. Without a verified distance, such dimensions and speeds remain estimates. The report describes a dull, non-reflecting grey surface, with no noise, openings or antennae. Earlier publicity had supplied different details, including an antenna-like feature; the November account should not simply be merged with those versions.
One photographer, a developer and a mistaken public credit
Stock identified his camera as a Kodak Duaflex II, a fixed-focus reflex camera with a Kodet lens, using size 620 Plus X film. He did not know its fixed shutter speed. The equipment matters because it limits how much can be recovered about the exposure and distant scale from the account alone. It does not, merely by being inexpensive, determine whether the image is genuine or fabricated.
The early press account named Riley as the photographer and Stock as a witness. An October report by Special Agent Lee S. Thomas relayed information that Stock had actually taken the pictures. The November inquiry then interviewed both men and established their different roles. Stock said he delivered the film to Riley for development on the afternoon of the sighting and remained in the darkroom during processing.
Riley’s subsequent interview likewise identified Stock as the person who brought in the exposed film. Riley said he developed and enlarged the images, made several sets and attempted to sell them to newspapers as photographs he had taken. That admission explains the misleading credit. It does not by itself establish how Stock produced the images or whether the photographed object was at the distance he believed.
A separate address error also emerged: a reporter had substituted his own address when filing an early account without Riley’s address. This administrative confusion contributed to the background inquiry. The private addresses in the released papers are unnecessary to understanding the evidence and are not reproduced here.
What was collected and what was missing
The November report records seven prints and five original negatives supplied by Stock. Two negatives were said to have been lost or mislaid. The enclosure descriptions attempt to place the images into the reported sequence, including approach, hovering, the tilted phase and departure. These descriptions preserve what the witnesses said each image represented; they are not a complete independently timed photographic record.
Stock asked for the material to be returned after examination. He and Riley both denied retouching the negatives, and Stock said he had watched the processing. Such statements concern possible manipulation during development. Even an unretouched negative would not, on its own, establish the size, distance or identity of whatever was placed before the camera.
Wertz also prepared a drawing with both witnesses on 19 November. The report says they approved it as nearly accurate and explicitly describes the annotations as their observations and beliefs. The drawing is useful for distinguishing their claimed domed profile from vague later references to a saucer. It should not be treated as an engineering diagram or an additional photograph.
The searches and local technical checks
The Stocks invited the investigator to inspect their home and outbuildings. A small workshop contained ordinary mechanical tools, including a lathe, planer and grinder. The report says no object resembling the photographed form was found. Riley also permitted a search of his business, where investigators found photographic processing and enlarging equipment but no specialised photo-engraving or microscopic apparatus.
Those searches document an actual investigative step. Their negative results do not demonstrate that no simple model or other photographic method could ever have been used. Conversely, the presence of workshop tools does not prove that the witnesses manufactured the object. The record needs both limits, rather than a verdict derived from either fact alone.
Investigators checked nearby companies involved with radar and microwave equipment. One inquiry asked whether an antenna or other apparatus had broken free; the answer was negative. A further inquiry found that relevant experimental equipment had not been operating on the sighting day. These were checks of possible local explanations and available information. They do not establish a radar observation confirming Stock’s object.
The weather evidence also deserves qualification. Stock recalled clear, bright conditions, little wind and extensive visibility. Newark weather records consulted during the inquiry described haze, thin cloud, visibility of roughly one and a half to three miles and stronger wind. The technician discussed how conditions might apply to Passaic. A nearby station record supplies context, not a precise observation at the witnesses’ position.
Why the Air Force remained doubtful
An early Air Technical Intelligence Center request raised two connected objections. A large object lingering over a populated area might be expected to generate other reports, while the image’s apparent size could also fit a much smaller nearby object. Investigators sought other sources and background information. References from people who knew the Stocks generally supported their honesty, but those character opinions were not additional sightings.
The separate released photographic file, numbered 1768, preserves an undated assessment alongside the images. It says the photographs were never proved to be a hoax, but points to the unresolved scale and absence of independent observers. It also notes that photographs of this sort could be fabricated without advanced photographic expertise. The statement expresses scepticism without presenting a demonstrated reconstruction of the entire sequence.
The November report’s closed status concerns completion of that special inquiry. It does not mean that a non-human craft had been verified, nor that every possibility had been eliminated. The sources reviewed establish a reported disc, surviving photographic material, corrected attribution and substantial reasons for doubt. They do not establish the object’s physical dimensions, its claimed manoeuvres independently of the witnesses or an extraterrestrial origin.
Location and sources
The map pin is an approximate Passaic city reference, rounded from the U.S. Census Gazetteer. It does not identify the Stocks’ former home, a modern private property or a measured object position, and is not a visitor destination.
The main investigative source is the released-document transcription in “The Photographer’s Tale”, especially the 14 October and 29 November 1952 Office of Special Investigations reports, file 24-300, and the earlier ATIC request. The six-page photographic file 1768 contains five reproduced photographs and an undated sceptical assessment. The Wertz sketch’s source record identifies its government authorship; its date is established by the November report, rather than the file page’s inconsistent 1951 entry. Coordinates derive from the 2025 Census county-subdivision Gazetteer. Sources checked 10 November 2026.
For a separate 1952 photographic investigation with laboratory comparison images, see Alpert’s Salem photograph.