The body of 46-year-old Jose Ramiro Baez Paredes of Santa Ana was discovered in a trash can on the side of Brea Canyon Road.
A passerby noticed the bin had been out of place for the past week and stopped to take a look during his drive to work.
Investigators have not yet determined a cause of death. It remains unclear how long the bin or the body had been on the side of the road.
The investigation is ongoing.