The killer is arrested but shoots Boyle when he jumps to save Rosa ( Stephanie Beatriz ) .
After investigation , Holt finds that the death threats come from a killer he pursued years ago and sets to find him on a train station .
The killer is arrested but shoots Boyle when Holt jumps to save Rosa ( Stephanie Beatriz ) .
After investigation , Holt finds that the death threats come from a killer he pursued years ago and sets to find him on a train station .