It wasn’t hard to tell when Michael R. Galasso was getting serious. “The Galasso finger,” Timothy M. Daw called it. “He would stand with his arm a little bit out about shoulder height with his index finger out, and he’d shake it a little,” said Daw, a senior partner at Schiller, DuCanto & Fleck LLP’s Wheaton office, where Galasso practiced for 15 years. “He’d have a huge smile on his face and say something like, ‘Now, Tim …’” When …