Proving criminal conspiracy is often difficult because there is little physical evidence of agreement between persons if there is no contract. The criminals would have to be extraordinary stupid to create a written or otherwise physical contract to commit a crime. The best type of evidence, therefore, is a confession by one or more of the suspects. If such a confession isn’t produced, prosecutors must do their best to infer agreement from the circumstances. The first inference is one of vested interest: if a defendant has an interest in seeing the crime committed, then a jury could infer that the defendant could agree to commit the crime. The interest inferred is usually a monetary one. The second inference is if the defendant had no legitimate
