Given the task definition and input, reply with output. In this task, you will use your knowledge about language (and common sense) to determine what element the marked number refers to. The numbers are marked with two underlines around them, like: _ number _. Your answer should be chosen from the given text, and should not contain other words.

Calleigh Duquesne: Tripp said you put out a BOLO on a young lady .
Lieutenant Horatio Caine: Have we found her ?
Calleigh Duquesne: We found her car in the Glades . Apparently , there 's blood at the scene .
Lieutenant Horatio Caine: Okay , so let 's go back to the scene and turn over every rock .
Calleigh Duquesne: You want to work it as a murder ?
Lieutenant Horatio Caine: I 'm trying to prevent _ one _ .
murder