Las Lomas is a wealthy, built-up district of Mexico City. On 6 August 1997 something was filmed there hanging in the gap between three tall buildings, a metallic grey disc that hovered and then rotated rapidly. The footage is the reason the case exists. Around it sits a set of ground-level reports from people who say they were underneath: a whistling noise, animals in a panic, movement that did not behave like an aircraft. One woman describes the object rising directly over her rooftop, leaving a red glow behind it and effects on her health that lasted.
What is on the record
The archive holds one telling on one channel and resolves four claimants: Arturo Gacias, Cassandra, Annie Lask and an unnamed university student. The account itself says at least twelve eyewitnesses were traced. That is the source's own figure and it is reported here as the source's claim; the archive's resolved count is four.
The footage is the case and also its main unresolved question. The archive holds no authentication of this tape, no chain of custody and no analysis it can point to. A disc rotating in a narrow gap between towers is the kind of image that rewards scrutiny it has not received here. Nothing in the file rules out an ordinary object filmed at an awkward distance, and nothing in the file establishes that it is one.
There are no documents. No official report, no press file, no primary paperwork of any kind. The physiological complaint from the woman on the rooftop is recorded as her claim and there is no medical record behind it.
Why it sits where it does
The case grades L3, several named claimants attached to one connected event. It sits below the document-corroborated tier because it has no government record and no authenticated video, only footage of unestablished provenance. What the record holds is a piece of daylight film and a handful of people who say they were beneath it. What the film shows is not resolved here.