Mafia 26. Lady Mallowen's Last Caprice

I was just thinking that with the help of a booster, there should be at least 4 pieces of evidence against the murderer. Aren't the Mafia taking too much of a risk?

Well, if the Mafia member is a Register, then there would be nothing surprising about a large number of planted pieces of evidence. But in other cases, evidence is planted very rarely.