..., I often cannot locate said citizen to discover why they passed on. The Almanac gives me how many people died, but not who they were or why they gave up the ghost. What is the best way to track down my dear and departed?
There is no way! What Chris says works only for the citizens in the workforce. So if the recently deceased is a Baby (Infant), Child, Mother, Student, Retiree, or Rebel - they will NOT show up on the lists\ pay-page on the zero line. Only some of those on the zero pay line will be dead; all Unemployed show there (there is no such avatar or sort for "homeless" - shacks are too easy to build).
However - finding individuals only to read
"why they died" is useless. That sentence is sheer verisimilitude. Except for starvation, assassination, or combat - death is the result of the tolling of a date created when the unit was created (call it 'predestination' if you wish). The random events causing mass deaths (storms and epidemics) do not leave bodies strewn about. Therefore, the only reason to look for recent deaths is to keep tabs on your key positions - Doctors, Engineers, etc.