Defending yourself when you're accused of a crime like selling or using drugs is important not only for your current life and reputation, but also for your future. Being convicted for drug crimes can affect your ability to get a job, good housing or other important necessities, as many charges will be on your record as felonies.
Fortunately, you can only be convicted of the crime if the prosecution can prove that you're guilty beyond a reasonable doubt. If you can create a defense that raises doubts about the case, then you likely will not be able to be convicted. You are innocent until proven guilty, and you can plead the Fifth, which means you don't have to say or do anything that would make you self-incriminate yourself. It is not your job to prove that you're innocent; instead, it's the prosecution's job to prove that you aren't.
If you have an alibi, that can be one of the best defenses available. Having another person who can vouch for your good character and say where you were or what you were doing can make a difference in your case. For instance, if the alibi says the police have arrested the wrong person or that it wasn't you in a video that was taken, then you may be able to encourage doubt about the case and eventually be proven innocent.
There are many kinds of defenses you can speak about with your attorney, and every case may require a slightly different approach. Our website has more on drug charges and what to do if you've been accused.