All drug cases have to have the drugs analyzed before court to determine the possessed material contains an illegal substance or not.
Step-by-step explanation:
Particularly in the drug cases in the USA, the law enforcement officer has to prove the criminal charges to enable the court to quantify the quantum of punishment for possession of a drug.
So, the forensic department as to ascertain the substance or the material which has been confiscated from the criminal contain any particle which is considered to be illegal. The forensic result will be submitted to the court through the law enforcement officer for the prosecution to make it a fit case for trial.