apparently it is a place where the coward felt familiar enough that he could be undetected if on foot. but, I think he wants to be caught.
if he is experiencing mania/depression, he is likely bipolar/schizophrenic or both and can be managed with proper diagnosis, treatment and support. there is no need to keep feeling the intense emotions that result in homicidal behaviour. no need for any vulnerable, innocent victim to pay the price for his own suffering. to kill an innocent vulnerable child is to attempt to kill that vulnerable child part of yourself. he was likely subject of unbearable torment as a child. an individual can find compassion and support and empathy and ultimately HELP AND RELIEF for their pain instead of using it to inflict pain on others. he is not taunting LE, he is passive/aggressively rebelling against his own childhood abusers (parents?), b/c he was never in a safe enough situation to actually rebel as a young teen.
the irony is, in this attempt at a power grab with public authority figures/LE (a symbol of fighting back against his own abusers whom he knew were wrong and whom he hated) he perpetuates the pain that was inflicted on himself onto new innocent victims and BECOMES THE ABUSER. the one his innocent child self hated. he hates the innocent b/c he was not safe as an innocent himself. he hates himself for now being the abuser.
JUST STOP THE CYCLE AND ASK FOR HELP. NOW!
there is help. this is not a game. it is real. it is your life. your soul. Jessica's life and her soul. her family's lives. when you die you will see the reality of the duality of earthbound existence and each of our challenges and will see where you failed honoring your true spirit of beauty and love, and how you sacrificed the purity of spirit of Jessica and any others in your wake because you did not heal your own pain - you simply reflected it out onto the world. value yourself - there is a part of yourself you cannot acknowledge that is still valuable. value it and trust it is there, and therefore value the lives of others. DO NO HARM.
a side note - this guy is not in the DNA database - no past offenses occurred requiring a DNA sample.