Phoenix Wright: Ace Attorney Trilogy HD (iPhone iPod)
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Court Record
Before you start a cross-examination make sure you check the court Record. Read ALL the character profiles and examine ALL the evidence carefully.
Cross-Examination
Before a cross-examination always remember to save your game. Doing this will enable you to come straight back if you screw-up an accusation.
Evidence
It is always worth making sure you have presented ALL your evidence to witnesses and bystanders when you get stuck on an investigation scene.