Location Last Seen: Modesto, Stanislaus County, California
** Listed information is from the time of disappearance.
Date of Birth: June 19, 1954
Age at Time of Disappearance: 31
Race: White and/or Hispanic
Height at Time of Disappearance: 5'7"
Weight at Time of Disappearance: 115-140 lbs.
Hair Color: Light brown
Eye Color: Hazel
Alias(s) / Nickname(s): Possible last names of Baca and Standly
Distinguishing Marks/Features: Pierced ears. A 1/2 inch "V" shaped scar above the left knee. Appendectomy scar on stomach. Possible "Butterfly" tattoo on right hip.
Dentals: Available. She is missing two upper front teeth.
DNA: Available in CODIS.
Clothing & Personal Items
Additional Personal Items: Unknown.
Circumstances of Disappearance
Sylvia Lourdes Standley walked out of Stanislaus County Women's Facility on Oakdale Road on June 3, 1986, after serving a two-week sentence for a drug violation. She called her family to let them know she would be home later in the day, that she would catch a ride to her Modesto home with her new boyfriend.
She was last seen getting into a green or blue truck on Oakdale Road. No one in her family had ever met her new boyfriend and didn't know his name, or anything about him. She was last seen getting into a green or blue truck. She never returned home.
When Standley went to jail, she left her 8-month old infant daughter with her mother. Some sources list May 29, 1986 as her missing date.
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