You are a homicide detective and you have been called to a crime scene where someone has been killed but you can鈥檛 solve the case you can hire one of these people to help you who would you choose?
I don't need anyone's help, get the forensic team to gather all evidence available, get all suspects in custody and get a court order for DNA samples and any other material we might need for comparison. Take advantage of the suspects ignorance when it comes to law and threaten them into spilling the beans.