Process of Elimination

The process of elimination
That's how a killer's found
Soon I'll make my declaration
But first the process of elimination
How did Arthur end up lying face down in his soup?
Did he do it to himself? Well, let's start with the group
Next to him was Lily, maybe Lily slammed the door
But how could she have done it when George knocked her to the floor?
The process of elimination
Let's call the body X
Solve the Y in this equation
And that's the process of elimination
George you see was moving with a needle in the dark
And would have struck the killing blow if she'd not hit her mark
Yes, Vivica had thrown a dart, but fate would intervene
While George injected poison, she'd administered vaccine
The process of elimination
No, you both are not off the hook
You'll be coming to the station
But first, my process of elimination
Maybe Shay's the killer, he had to certainly commit
To his role at the table, he was hiding under it
Kurt's the one who left the room to turn the lights back on
And in the dark bumped Cameron, which is why his knife was drawn
The process of elimination
Both of you are innocent
I'm almost to my accusation
In my process of elimination
(In my process of elimination)
Joan, it must be Joan, except her alibi is sound
The really quiet, creepy kind, her people tightly wound
So none of you have done it, which can only mean one thing
There's someone else inside this house who did the murdering
There's someone in this place who's got a face you've seen before
I have solved the case, the killer's right behind this closet door