Gutierrez was last seen at the Kenwood Country Club in the vicinity of the 14000 block of Cove Lane in Rockville, Maryland. She had been working as a cocktail waitress there for about a week. She was supposed to pick up a friend at a bus stop at 9:30 p.m. and then go to meet her fiance and other friends at a nightclub. Authorities believe there was a communications error and Gutierrez's friend was waiting at a different bus stop than Gutierrez thought. She was last seen at 9:25 p.m., shortly after she clocked out of work. She has never been heard from again. Her friends began searching for her when she failed to meet them as planned; they called the police at 2:00 a.m. on August 24.

Gutierrez's car, 1971 Dodge Challenger, was found abandoned the day after her disappearance in a parking lot near the National Institutes of Health in Bethesda, Maryland, where she held one of her two jobs. The location is adjacent to the bus stop where investigators believe Gutierrez thought she would meet her friend; the friend was actually at another bus stop 500 yards down the road. There were no signs of a struggle at the scene.

At the time of her disappearance, Gutierrez was attending Montgomery College. She is a native of Ecuador who moved to the United States four or five years prior to her disappearance; shortly before she vanished she became engaged to a student from Pennsylvania. Her case remains unsolved.