Fabian Del Rosario was last seen in the area of 30th St. & Colorado in Boulder, Colorado, on August 28, 1987, at 7:00PM. He dropped a friend off near that location and was suppose to pick-up his girlfriend when she got off work at 7:30PM. Fabian never showed up at his girlfriend's work and has not been seen or heard from since.

At the time of his disappearance, Fabian was driving a brown Datsun 280ZX. In the early morning hours of August 31, 1987, a patrol officer located Fabian's vehicle in the parking lot of Crossroads Mall near 30th St. & Walnut in Boulder, Colorado.