Every person on trail by the American judicial system is entitled to the fair trial; regardless of crime they're being tried for. In saying this, members of judicial system should ensure that the defendant's rights are carried out based upon their Constitutional rights in order to uphold fair treatment. Judges often use presentence investigation (PSI) in order to ensure that defendants are properly tried in accordance with their crimes and laws. Discuss the purpose for presentence investigation as well as the types of the information that are included in the PSI and how they are collected.