I'm not sure if RC's law firm qualifies as a boutique law firm, given the range of specialty areas that they cover, including both family law and criminal law. Boutique law firms usually have a naarrow focus on a specialty.
Boutique law firm - Wikipedia
A boutique law firm is a collection of attorneys typically organized in a limited liability partnership or professional corporation specializing in a niche area of law practice. Although a general practice law firm includes a variety of unrelated practice areas within a single firm, a boutique firm specializes in one or a select few practice areas. There may be some confusion as legal publications may refer to any small- or mid-sized firm as a boutique, though generally firms with fewer than 100 attorneys would count. Boutique should apply to those firms that focus on particular areas, regardless of size, though they are typically smaller, with exception to a few firms such as Finnegan, Henderson, Farabow, Garrett & Dunner or Fish & Richardson with over 400 attorneys.
Examples of niche areas of law practices of boutique law firms include:
Intellectual property
Labor and employment
Litigation
Technology and venture capital