Help Sought Locating Missing Lancaster Teenager Who Never Returned Home From a Walk

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Tianna Guerra-Rosten, 16, is seen in two photos provided by the Los Angeles County Sheriff's Department.

Sheriff’s deputies and family members were asking for the public’s help Thursday in locating a 16-year-old girl who disappeared from her Lancaster home after going out for a walk.

Tianna Guerra-Rosten was last seen around 5:15 p.m. on Monday in the 42100 Block of Madison Court, according to a news release from the Los Angeles County Sheriff’s Department.

Her parents told investigators the teenager was wearing a gray hoodie, dark gray sweat pants and a black t-shirt when she left for a walk.

The girl never returned home.

Guerra-Rosten is approximately 5 foot 4 inches tall, 105 pounds, with long brown hair and a tongue piercing.

She has recently suffered from depression and has no history of running away from home, the release stated.

Anyone with information was asked to contact the Lancaster Station at  661-948-8466 or dial 9-1-1. If you prefer to provide information anonymously, you may call “Crime Stoppers” by dialing 800-222-TIPS (8477), or texting the letters TIPLA plus your tip to CRIMES (274637), or by using the website

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