DENVER (AP) - A Colorado undersheriff who led the search for a Florida teenager whose actions prompted tightened security at Columbine High School says she likely killed herself before police launched a massive manhunt.

  

Clear Creek County Undersheriff Bruce Snelling tells The Denver Post that 18-year-old Sol Pais likely killed herself Monday evening. Her body was found in the snowy foothills west of Denver on Wednesday.

  

Snelling says, "The logical likelihood was she was here to end her journey."

  

A manhunt was launched Tuesday, the day after Pais traveled from Miami to Denver and bought a pump-action shotgun and ammunition. FBI officials were concerned that she planned an attack of her own because she was "infatuated" with the 1999 Columbine shooting that killed 13 people.

  

Saturday is the 20th anniversary of the attack.