The Coyame 1974 Mexico UFO Crash was featured in Hangar 1 The UFO Files S01E04 Crashes and Coverups the evidence seemed very compelling so here is a thread to discuss it.

There is a write up here...

This is the story of a UFO crash involving a civilian aircraft over Mexico. Passed down by word of mouth the people of Coyame believe this story is true, this is their story.

On the evening of 25th August 1974 the US Air Defense radar detected a UFO about to cross into American airspace coming up from the Golf of Mexico. The object was tracked at speeds of up to 2500 mph at an altitude of 75,000 feet. Continuing on this course the object would enter US airspace over Texas.

At first it was thought that the object may be a meteor. However while over Mexico the UFO leveled at 45,000 feet, descended to 20,000 feet, leveling for 5 minutes at each altitude. After tracking the object for about a minute the UFO slowed to 1900 mph and began to descend and turn at the same time. The descent was “stepped” and not curved as a meteor would have been. Also the speed of the object changed, a meteor would not have changed speed on descent, i.e. slowed....

Kevin Randle is a little scathing of the whole case

UFO Hunters segment on Coyame

'Mexican Roswell' Book about it by Noe Torres and Ruben Uriarte (who it's claimed managed to get flights plans and get the names of the dead Mexican soldiers who died.)

NOE TORRES, “MEXICO'S ROSWELL” - on Rense new local witnesses