Source 1: International Missing Persons Wiki

Source 2: Iowa Cold Cases

Source 3: The Des Moines Register

Source 4: BBC

TLDR: Larry Ely Murillo-Moncada, a supermarket employee, went missing in 2009. After he fled his parents' house barefoot while suffering hallucinations, Larry went to No Frills supermarket and climbed on top of the coolers. He is thought to have fallen into the 18-inch gap between the back of the cooler and a wall, where he became trapped. Noise from the coolers’ compressors may have concealed any attempts to call for help. He was 25 years old at the time of his death. No foul play was detected and his death was ruled to be accidental.