Question

what did the stranger actually want?
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Answer 1

Answer:

Realising what he had done, it dawned on him that he needed to frame an alternate suspect, and so planted evidence to incriminate the now-disappeared Corrine as the murderer. Katz story ends as he shoots the Stranger – shortly after she had revealed her story to Adam – and is subsequently arrested by Johanna.

Explanation:

Pʟs ᴍᴀʀᴋ ᴀs ʙʀᴀɪɴʟɪᴀsᴛ ᴀɴᴅ ғᴏʟʟᴏᴡ ᴍᴇ✌️

Answer 2

 However, in the final episode it was revealed the money was actually stolen by her friend Tripp (Shaun Dooley). He wanted the money to be able to provide more for his family. Corinne learnt it was him who stole the money and had threatened to reveal the truth about him, but he framed her.