Sara - these are called sentinel events -
and gives the employer to trawl back through all the notes
looking for others
or to interview the other staff and invite them to "spill the beans"
The idea is that sentinel events lead on to Big Events
and unfortunately (for the amount of money spent on this rather than caring for you and I) sentinel events may be random....
in which case the look-back exercise is a complete waster of everyone's time and money. - as all you identify is a non-cluster of random events.