Many characters are murdered, but the scenes take place in dark areas- so you won't see very much (SOME spoilers here : )
A young woman is pulled behind a countertop and slashed with a hook- all we see is the shadow of the hook on the wall, then blood splatters on it.
A young woman steps into a beartrap and bleeds profusely from her ankle (it's very dark, so some of this is hard to see).
A young woman is pulled behind a stack of clutter in an attic and slashed with a hook- all we see is the shadow of the hook on the wall, then blood splatters on it.
Two bloody dead bodies are seen hanging from a ceiling and dripping blood.
A young woman is killed in a bathroom (not shown).
A man is stabbed, shot, and bludgeoned many times over the course of the movie, he bleeds and gushes blood a lot... but never dies.
A young woman is slashed in the chest with a hook- you don't really see the cutting while it happens, but you see blood from the wound as she talks later.
A man stabs a woman twice with a knife, she bleeds but doesn't die.
A young woman's body is found in a bathtub filled with blood, she raises up and we see a nasty scar on her chest.
A woman stabs another woman in the neck, blood squirts all over her face.
A man pulls a knife out of his torso, where he'd previously been stabbed, and groans in pain.
A woman is shot to death.