ST. JOSEPH, Mo. (AP) — Missouri parents whose children have been missing for years say they struggle to keep their children's cases in the public eye while dealing with the frustration of not knowing what happened.

One such parent is Tammy Mack, whose 15-year-old daughter Ashley disappeared from St. Joseph 10 years ago. She says she hasn't given hope of finding out what happened to Ashley but she no longer spends hours every day online and on the phone searching for clues.

She and family and friends held a candlelight vigil at the pool Sunday night. She also planted a tree near to pool in her daughter's memory.

The Kansas City Star reports (http://bit.ly/TNBKSe ) a convicted felon who lived in Ashley's neighborhood is a strong suspect in her disappearance but no one has been arrested.

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Information from: The Kansas City Star, http://www.kcstar.com