Lawfag here. Securities litigation to adoption law is one of the most bizarre shifts of practice area I can think of. Have never seen it before. Not inherently suspicious (I suppose there could be a reasonable explanation) but still highly unusual.
As someone who has worked in commercial litigation, to all of a sudden switch to, say, handling divorces exclusively would require learning a brand new set of skills, colleagues, a different court system filled with different judges and procedural rules, and I'd need to build a new book of business (clients) from scratch after working with exclusively business clients.
Nice catch, anon.