 <translate> To answer the question, consider the following: When Dave finally admits to killing Katie thinking he can escape with his life, Jimmy kills him and disposes of his body in the adjacent Mystic River.
Therefore, the answer is Dave. <yor> Láti dáhùn ìbéèrè yìí, ronú nípa ohun tó tẹ̀ lé e yìí: Nígbà tí Dave wá jẹ́wọ́ pé òun ló pa Katie, tó sì rò pé òun lè bọ́ lọ́wọ́ ikú, Jimmy pa á, ó sì ju òkú rẹ̀ sínú Odò Mystic tó wà nítòsí. Nítorí náà, Dave ni ìdáhùn náà. 