For those who saw an infamous mysterious UFO sighting near Chicago, IL nearly 20 years ago, the answer has yet to be found. Sightings over Tinley Park occurred on August 21, 2004, and October 31st, 2004. We have corrected the date above.
Growing up in rural Illinois, far from the nighttime orange glow of Chicago, the skies were dark, crystal clear, and dazzled with glittering stars. Picking out the Big Dipper was easy, and the muffled sounds from airplanes barely made a peep. So, when something felt out of place, people tended to notice. Every once in a while, you'd cock your head to the side and wonder, "What's that?" while staring up.
Here's what he said. In August and October 2004, people living in the village and the surrounding communities of Orland Park, Frankfort, Oak Forest, Mokena and Evergreen Park reported en masse seeing in the sky three lights in a triangular pattern.
Fifteen years ago, hundreds of people in Tinley Park and surrounding communities reported seeing a triangle of lights hovering over the area. No one - not even The History Channel - could explain them.
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Various shapes of reported UFOs.
Initial Sightings and Eyewitness Accounts
On August 21, 2004, residents and visitors to the southwestern suburb of Tinley Park saw something in the sky that, while familiar, wasn't quite like anything they'd seen before. Less than an hour outside Chicago, the area was used to seeing planes flying to and from O'Hare and Midway airports - however, witnesses didn't believe what they were seeing was an airplane, even though the Chicago Air Show was taking place that weekend. In addition to residents, the mysterious lights were spotted by many concertgoers who were leaving the then-Tweeter Center (today the Credit Union 1 Amphitheater) after seeing Ozzy Osbourne perform.
When eyes turned to the sky, witnesses reported seeing groups of three white or red lights that formed a triangle. The lights appeared to move in a coordinated pattern and would change between moving and sitting stationary for 30 minutes at a time. Unlike the airplanes, the objects made no sound. Though it was at times hard to see, astonished and confused witnesses rushed to capture photos and video footage that showed the glowing lights and their movement. A zoomed-in photo of one of the lights fails to provide an explanation, only adding to the mystery.
Interestingly, a similar light formation was seen in British Columbia and Minnesota in the two days leading up to the Tinley Park sighting. After the sightings in Illinois, the lights were reported in Houston, Texas, then in Melbourne, Australia.
Location of Cook County, Illinois where Tinley Park is located.
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Subsequent Appearances
Then, 71 days later on Halloween, the lights reappeared. They came back on Oct. 1, 2005, and again on Halloween in 2006. With hundreds or more of eyewitnesses, it's a phenomenon that's never truly been explained, although some leading theories have been debunked. While many reported seeing the lights over Tinley Park, the nearby suburbs of Orland Park, Oak Forest, Mokena, Matteson, Lake in the Hills, and more also saw the action.
Media Attention and Investigations
In fact, the sightings were so prolific that they attracted national media attention, including from the History Channel TV show "UFO Hunters," which featured the lights in an episode. During the segment, witnesses share videos and recall their experiences, and experts attempt to recreate, explain, and experiment on theories related to the lights. Ultimately, no one could explain what had been seen.
Theories and Analysis
It was not a hoax. We have analyzed this stuff. The History Channel...and many other people analyzed it. If it was a hoax, it was a really good one. But we discounted it.
Here are excepts of Patch's conversation with Maranto, edited for space. Why the Navy's acknowledgement of the Nimitz incident is important: To me, the most important thing is the human element and the fact that they finally acknowledged the phenomenon is genuine and needs to be taken out of the gutter - that it should be researched and analyzed scientifically. And stop ridiculing people. Ridicule and sarcasm are the best form of censorship and very abusive. I am happy the Navy has developed a policy [about investigating] this.
What they're saying is the phenomenon is genuine. Possible explanations for Nimitz: We are pretty far advanced when it comes to this technology. It is our technology out there? Is it our technology flying over Tinley Park? Who is "our?" Is it just the military industrial complex with something so exotic it set aside and set aside far and for what purpose? Is there something else going on that we're completely in the dark about? One can speculate forever and ever. What we try to do is deal with the evidence at hand and make rational deductions and hypotheses based on that.
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People don't want to consider we aren't alone. We're not alone - at least I don't think so. And now are having visitors from someplace else? Who knows? We can't discount that. But don't hang out hats up on all of this, either. You have to keep an open, objective mind and evaluate information as it comes forth and that is it.
Generally, people who see something, at best you get less than 1 percent of the reporting. But here you have a mass sighting and many people reporting it. They were saying "hey -my neighbor saw it." Groups of people - there was a block party during one of them - saw it. They were pretty grounded and doing the right thing in getting another person to look, too, to get that person's perspective. Those weren't the only sightings that year. But here in Tinley Park, we had hundreds of people seeing these [two] events. People said multiple illuminations, red lights, unusual illuminations first in a triangle and then moving around.
So could the Tinley and Nimitz incidents be the same phenomena? I can't make that statement. Isn't it peculiar that something unusual is happening there at maximum two weeks later? To consider the possibility there may be some sort of correlation is pretty good thinking. It's a logical consideration to think there may have been something, but we have no evidence to support that whatsoever.
Eyewitnesses describing the Tinley Park UFO sightings
Comparison with Other UFO Sightings
Hundreds of reports of UFO sightings are filed in Illinois every year; here are some of the more, um, plausible ones from the database-complete with Maranto’s insider take.
Case Study #1: The Rockford Orbs
When: 1999-2001
Where: Rockford
What happened?: A formation of orange orbs appeared repeatedly over the Rock River valley, each time floating leisurely across the sky before disappearing.
Maranto: “Of the 13 nights of sightings up there, I could substantiate the bulk of it as legitimate.
Case Study #2: The Champaign Beams
When: February 2, 2002
Where: Urbana-Champaign
What happened?: Shortly before midnight, various students and residents of the college towns observed clusters of amber-hued lights flashing in a line across the sky, from southwest to northeast. The most convincing witness, a police officer, watched objects hover above Memorial Stadium and reported all kinds of chatter about unidentified objects on his scanner that night.
Maranto: Defers here to Victor Connor, an Illinois Mutual UFO Network field investigator who calls the case legit. “Nobody knows what it was,” Connor says. “It wasn’t planes; it wasn’t balloons. But it was pretty minor.”
Creepy detail: One witness said that some buildings had been lit up with spotlights originating from the objects.
Case Study #3: The Tinley Park Lights
When: August 21, 2004
Where: Tinley Park
What happened?: On a clear summer night, three red lights hovered in a triangular formation for almost half an hour and then flickered out, one by one. Call after call came in to the National UFO Reporting Center that night, each describing the same three red lights. Several videotapes exist, including one that Maranto says shows objects flying in and out of the lights.
Maranto: “This is the case. A hell of a lot of people saw it.
Case Study #4: Return of the Tinley Park Lights
When: October 31, 2004
What happened?: Two months later, the “Tinley Park Lights” returned to the skies above the south suburbs-on an auspicious date. Hundreds of witnesses viewed the incident; accounts described entire blocks of trick-or-treaters gaping up at the sky.
Maranto: “The lights were visible by observers from at least 12 miles away-so that pretty much rules out a hoax. And this object was frigging massive. It was as big as the Tweeter Center.”
Creepy detail: Maranto claims that, in a video, what look like helicopters appear to be keeping planes away from the area.
Case Study #5: The St. Clair Triangle
When: January 5, 2000
Where: St. Clair County (across the Mississippi River from St. Louis)
What happened?: Only one witness had the presence of mind to snap a photo-and it’s inconclusive (i.e., lousy).
Maranto: “This is a topnotch sighting. Because the area was mainly rural, light pollution wasn’t [as] prevalent as in Tinley Park. They all saw the object[s] maneuver like nothing prosaic.”
Creepy detail: “As it passed,” one witness claimed, “I . . .
NUFORC Data on UFO Sightings
NUFORC has collected over 100,000 UFO reports spanning decades. The most common description was of "lights" in the sky, and many UFOs were of an "unknown" or "unspecified" shape. As of 2025, other reported shapes include:
| Shape | Number of Reports |
|---|---|
| Cubes | 90 |
| Cones | 643 |
| Crosses | 531 |
| Teardrops | 1273 |
| Stars | 280 |
Final thoughts: I think the tide has changed and talking about this is not ridiculous. It is now being taken seriously. I think time has come to consider other possibilities and other forms of technology and that this could only advance things. It scares the heck out of people because it's a threat to a paradigm, the way things are. Any time there is change or deviation to a paradigm, it is perceived as a threat. And that is even in science. Science is supposed to be tentative, not a dogma. I have a lot of faith in humanity, but what I see recently and the way the world is crumbling, I think about what Ronald Reagan said about what would we do or how would we react if our world was confronted by an extraterrestrial presence? What would we do?