In episode two, there’s a dead deer on the hood of a vehicle with its throat ripped out. It’s killed offscreen. Oh and later in episode two, it’s severed head is briefly seen in a bathtub.
The killer turns out to be Abbys half brother who is in love with her. When it's mentioned he says "I know, I can do the math" and then attempts to defend his desire for an incestuous relationship by claiming no one will ever know because he's killed them all.
A dead deer is shown covered in blood on the hood of a character's truck. Numerous fish are shown being chopped and gutted. A dead, mutilated raccoon is shown twice.
In ep10 several characters are seen crawling through concrete tunnels. The tunnels are roughly the same size as all standard issue Hollywood air ducts, so it’s rather close quarters.