Police followed several leads and questioned local sex offenders with no luck.
Tabitha's parents said she was a shy, unassuming girl.
Cops say it's unlikely Tabitha ran away: she left her makeup, clothes and money at home.
Police cleared Tabitha's parents with a lie detector test. Her 24-year-old brother is also not believed to be involved.
Cops say Tabitha likely disappeared while walking from her house to the bus stop.
A neighborhood boy claims to have seen Tabitha get into a red car near the bus stop.
This note was found in Tabitha's room.
Police are still trying to determine who M.T.L. is.
This is an age-progressed image of what Tabitha is believed to look like at age 15.