Hammon was living in her boyfriend's mother's residence in Sacramento, California at the time of her disappearance. She was last seen leaving the house after an argument with her boyfriend on May 8, 1981. Hammon left all of her personal belongings behind, including her vehicle. She has never been heard from again.

Hammon was scheduled to work an early morning shift at the Burger King restaurant at Watt Avenue/Elkhorn Boulevard the following day, May 9, 1981. She never arrived at her employer's and the authorities were summoned to investigate her disappearance. Articles of Hammon's clothing, purse, makeup and identification were discovered in a dumpster behind of a shoe store across the street from the Burger King the day after she vanished. This was at Watt Avenue and Elkhorn Boulevard. On May 10, two days after Hammon was last seen, more of her belongings were found in a dumpster behind a grocery store. Some of them had been partially burned.

Hammon's case was originally classified as that of a runaway, but was since changed to a possible homicide by law enforcement. She has never been located and her case remains unsolved.