Who is 'The Joke'? (Batman: Arkham Origins)

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0:00 Lacey Towers
2:20 Sionis' Safehouse
2:36 Victim ID
3:00 Victim ID
3:17 Trace Evidence
3:38 Bullet Impact
4:02 Bullet Impact
4:29 Trace Evidence
4:55 Trace Evidence
5:18 DNA Evidence
6:50 Fabric Analysis
7:15 DNA Evidence
7:35 Digital Data Evidence
7:43 What I Got So Far