Why Did Stacey kill Archie?

Related questions

1. Are Lili and Cole broken up?
2. What does the S stand for on Jughead's shirt?
3. What does the S on Jugheads sweater stand for?
4. Who is Dylan Sprouse dating right now?
5. Does Jughead ever take his hat off?
6. Was Jughead asexual in the comics?
7. How much are the Sprouse twins worth?
8. Why does Jughead wear shirts with S on them?
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Tags

1. #hatred
2. #threatened
3. #trying
4. #christmas
5. #bipolar
6. #archie
7. #stacey
8. #motive
9. #branning
10. #accused
11. #before
12. #sectioned
13. #disorder
14. #ronnie