My conclusion is that there is no way Rafalle would be guilty. It's just not plausible that ANYONE would go on murder with a girl he just met 7 days before. Rafalle had also no motif. Killing someone because some random girl is disputing with her roommate about money, really?
If Rafalle is not guilty, then it's either Guede himself alone, or Guede and Amanda together, or Amanda alone. But Guede said he saw a man, though he did not name Raffale. Why did he say that? That warrants some thinking. Is he saying that because the authorities told everyone it was a multi person murder? If it was just Amanda, and Guede came on the scene later, he didn't need to include Rafael. If it was Amanda alone, then why did Raffale need to say she was with him and protect her, considering he's only known her for 7 days?
If Rafalle is not guilty, then it's either Guede himself alone, or Guede and Amanda together, or Amanda alone. But Guede said he saw a man, though he did not name Raffale. Why did he say that? That warrants some thinking. Is he saying that because the authorities told everyone it was a multi person murder? If it was just Amanda, and Guede came on the scene later, he didn't need to include Rafael. If it was Amanda alone, then why did Raffale need to say she was with him and protect her, considering he's only known her for 7 days?