Why kills worked:
1-2: Lack of public information and lots of misinformation across the board; killer was falsely cleared and the other murder plan at the time was discovered
2-1: Honestly no other reason than the escape route
2-2: No logical reason
3-4: Reasons in OP
4-1: Misinformation + Poison Murder + Skill Issue
4-3: Lmao
4-5: Collaboration
5-3: Poison Murder