"The Blair Nurse Project" shows that the missing woman the documentary is about was murdered by a doctor and made into a display skeleton... the one in Mark's office. For God knows how long, Dr. Sloan has been putting hats and props on it, effectively desecrating a dead woman's body.
At the end of "The Bela Lugosi Blues," how were they supposed to explain Jack killing Moriah Thomas in self defense? Surely the courts wouldn't believe she was a vampire.
They discovered she was the killer, she confirmed this, then to silence them as witnesses she attacked Jack, he defended himself, in the process she was accidentally killed.
In "Blood Ties," if the motive of the killers was to get organs from donors, why not shoot people in the head or neck to make sure they didn't damage anything they might need?
They couldn't really risk getting too close, and headshots at range aren't as easy as some shows imply.
In "Food Fight" Why did Emerson poison himself? It is made clear elsewhere in the episode that he strictly follows the rules of a Cater Waiter (Do not eat until the guests have left and all the glasses and linens have been repacked) so, had suspscion fallen on him because he avoided being poisoned, a quick check with his employer and likely his subordinates would confirm that it's not in his nature to eat while guests are present, immediately explaing why he wasn't poisoned. Instead, in attempting to throw suspiscion off he painted a big guilty sign on himself.
