Who betrayed Michael in Godfather 1?

Can you shed some light on the mystery surrounding the betrayal of Michael in Godfather 1? It's been a long-standing question among fans, as the film's intricate plot weaves through layers of loyalty and deceit. Who was the traitor who ultimately led to Michael's downfall, or did he fall victim to a more complex web of intrigue? Share your insights and theories on who you believe betrayed Michael and why their actions had such a profound impact on the story.