Algodoo

Killed: Cyan (since he also suffered from his broken leg, it's sad it has to happen)
Knocked out: Pink (and Red--who knocked himself out to have an alibi)
Killer: Red
-Red First knocked out Pink so she couldn't have any say on what happened. As Cyan's leg was broken, he couldn't exactly "run" away. So Sadly...Cyan was an easy Target. The Bandages from Cyan's broken leg must be apart of this scene, or the only part that makes sense.

killed: cyan
killer: red

Killed: Magenta
Killer Purple
Purple decided to betraye magenta by killing her First purple went into the lounge with her and then she threw magenta in trhe fire place Me and White wittnesd the assault we tried to stop her but we got knocked out.

(Conutinued) Howefer Purple di not put the full body in the fireplace and left the head.

Killed: Cyan
Killer: Red
They were all in the lounge when this happened, first Red knocked out Pink, then killed Cyan, put his body in the fireplace. And knocked himself out to trick everybody else.

Murdered:Cyan(No joke)
Murder:Purple
Purple may threw Cyan into the fireplace.(Just like how Lime was killed.)This can be true.And this ca be the hardest thing I ever respond.(I am scared for 4 times in a row!)

Answer:
Killer: White
Killed: Pink
Knocked out: Red and Cyan
Reason: (I don't know if this is correct...) White knew that Pink killed Green (I think?). White and Cyan had an injury. Meantime, Pink came to the White's room to treat his injury, Pink then walks out after that. He got angry because he didn't treat Cyan's injuries. White then came up a plan to kill her. When Cyan, Red and Pink went to the Lounge he knocked out Cyan and Red so that they could not see how will he kill Pink when Pink saw White, White immediately cut Pink's head and put the remaining parts in the fireplace. Although, White didn't know that one of his bandages (that Pink put to heal him) sticks to the couch inw hich Pink sat.
That's all. I hope this is right

Phew this isn't as hard as thge last one...
Killer: Pink
Killed: Cyan
Knocked out: Red & Pink knocked herself out
Explanation:
Well, Pink treated White's injuries but not Cyan's, so clearly she doesn't like him. Then she knocked out Red and cut Cyan's head off. She put the remains of his body in the fireplace. (Also the bandage is probs from Cyan's broken leg). Then she knocked herself out so other people wouldn't suspect her.