Round 2:

Obsidian Blue: arsenical toothpaste (COD) - yes
Jennifer's Books: The Hob, District 12 (CS) - no
Reading is my ESCAPE: Lydia Bennet (victim) - no

Team TFD

Tannat: Arthur Conan Doyle (suspect) - yes
Familiar Diversions: Pass

 

 

Killer: Arthur Conan Doyle

Crime 1:

Victim
Crime scene: the Orient Express
Cause of death

Crime 2:

Victim
Crime scene
Cause of death

Crime 3:

Victim
Crime scene
Cause of death: arsenical toothpaste