Yes. Anytime the police want to talk to you about drug sales, you should contact an attorney. The police are not on your side, but are working to gather evidence that may incriminate you or those you know. An attorney can advise you of your rights in dealing with the police so that you are not taken advantage of and do not do anything that may have a negative impact later on. If you wait until you have been arrested to contact an attorney, it may be too late.