De La Rosa was last seen in Portland, Oregon on August 3, 1990. She left home with an African-American male in a cream- or ivory-colored 1980s model sedan with a vinyl top. She left a letter behind saying she would be in touch, but she never contacted her family again. De La Rosa had a good job she liked at the time of her disappearance, and she left money in her bank account. Few details are available in her case. Her nickname is Katita and she may use the alias name Nicky Winters.