In a conversation with Arthur Rothrock on The Litigator’s Path, Hartmann explains how he built a referral-driven criminal defense practice starting with $4,000 in the bank, why he gives every client his personal cell phone number, what separates federal sentencing strategy from state court plea deals, and how he screens referral partners in a single meeting. The thread running through it all: the attorneys who grow the fastest are the ones who treat communication and relationship-building as core competencies – not afterthoughts bolted onto legal skill.