[DavidI]

Here is how I would handle the situation:

Call the police department and ask to speak to the Narcotics Supervisor. Make it very clear you want to remain anonymous. Provide the police with the suspect's name, description, vehicle information, and address. Tell the police what hours the sales most frequently occur and where the suspect may hide the dope (sometimes they hide it under rocks, inside trash cans, etc.) so it is difficult for the police to locate it. Keep a log of activity going on at their house to show the level of "visitors" carefully noting the time of the visit. If you have the ability to record them, do so and provide it to the police. Ensure they do NOT use your notes or the recording for prosecution because it will be easy to determine where you were standing when recording it and you can be identified.

Ensure you get the name of the supervisor and/or investigator you contact and remain in constant contact with them. This will ensure they focus on your problem location.

If you have any specific questions, PM me and I'll give you more info, David