One strategy to defend yourself in a drug case is to challenge the evidence against you. For example, any evidence collected without a proper search warrant, through an unlawful search and seizure, or any other illegal means may be contested. The following are other ways to challenge evidence against you in a drug charge:nQuestion the chain of custody: This refers to handling evidence from the crime scene to the courtroom. A break or inconsistency in the chain of custody can question the integrity of the evidence.nExpert analysis and testing discrepancies: Laboratory errors, contaminated samples, or flawed testing methods can lead to inaccurate results or false positives.nCross-examining witnesses: Your drug charge lawyer can challenge a witness’s testimony and identify inconsistencies, biases, and incorrect evidence handling.