It was 4 or 5 students. It is a clinical program. Student funding comes from externships not from the labs. Maybe the student interest shifted because everyone heard new professor had been hired. I heard they left before the new professor came but students already knew they had hired someone new.
A bunch of students left a lab around the same time. Maybe they want their research to go in a new direction. Now there may be potential for new students in that lab but not sure if it is a good lab situation.