Based on the details you've provided and Arizona's stalking laws (ARS 13-2923), Zach's actions may constitute criminal stalking. Here's a concise breakdown of the relevant laws, reporting steps, potential penalties, and an evidence assessment:

Laws Being Violated
ARS 13-2923 (Stalking): Zach's reported behavior—repeated unwanted communications, attempts to circumvent blocks, sending unsolicited items to your home address, and causing emotional distress—aligns with Arizona's definition of stalking. This includes :

A "course of conduct" (e.g., multiple unwanted communications over time).

Causing you to suffer emotional distress or reasonable fear for your safety or the safety of others .

Cyberstalking Elements: If Zach used electronic means (e.g., social media, emails) to harass or monitor you, this could escalate the charges .