1) how does an investigator prepare for an interview or interrogation?

1) How does an investigator prepare for an interview or interrogation? Are there differences?
2) Find a state supreme court or state appeals case from your state in which a conviction of a defendant from a lower court was overturned due to improper police tactics during an interrogation. Discuss and properly list the website.
I live in Texas and am also a cop. Please keep this in mind when responding to this discussion post. Thank you.

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