Why Aren't You Dead yet?

Forensics of my heart
 Show this crime scene has gone cold
 But this new evidence uncovered
 Will tell your secrets.
 You are my chosen one
 My perfect partner in crime
 I had your back, you stabbed mine
 Didn't see it coming
 You never know you want it
 Until you have to beg
 You think that I'd forgotten
 But here we are again
 And nothing's changed, you haven't changed
 You're still the same
 Why aren't you dead yet?
 Corroborate your alibi
 Witnesses testified
 That you were the guilty party
 How do you plead now?
 I am the innocent
 But if thoughts could prove intent
 And if I could get away with murder
 You wouldn't last a day
 Nothing's changed, you haven't changed
 You wiped the scene and walked away
 And did you think you'd ever get away with it?
 Causing suffering and pain
 Why aren't you dead yet?