i was watching when they gave mr. potkin a seizure. it sounded like they were questioning him about mr. qualls before he dropped. i was also there when lionel asked mr. qualls about his brother and caused him to bug out.

what i'm saying is that it doesn't seem to take much effort. mr. qualls is at the center of whatever this is and asking pointed questions might not give you the answers you want, but maybe the results.

it seems like something magical is blocking their memories and punishing them when they try hard to recall them, like a curse. i'm not sure that veritaserum would work since they can only tell you what they know.