Both programs happily generate a list of names. Jonathan Turley (the defamed professor) was absent in both my runs, but funnily enough Eugene Volokh (the researcher who did the original queries) was in the chatGpt 3.5 run.
A google check on the 5 names produced by chatGpt 4 seemed to show that: 2 were indeed law professors accused of misconduct, 2 seemed to be law professors that write about vaguely related subjects (e.g. abortion), and 1 one was also accused but not a law professor.
So not an entire miss, but not great either.
If you ask for an estimate on the number of reported cases. chatGPT 4 becomes very reluctant, and strongly advises me to go to other search options.