Absolutely heartbreaking. My heart goes out to folks who are trying so hard to break an addiction, yet have no choice but to return to an environment where they are surrounded by drugs.

Sounds like you have a meth lab nearby. I'm so sorry to hear about your mother's passing. Oftentimes, there is a strong cat urine-like smell affiliated with meth labs. Is that something you've noticed as well? Either way, keep calling until someone comes out to investigate.