Possibly narcotics.
5.56mm
Face reality. Uneducated young males, chronically using drugs with no real family or cultural structure,often themselves exposed to those drugs while still in the wombs of their drug using ,addicted mothers; catostrophic sudden violence and death is not uncommon. Its called “racism” when logical whites try to avoid contact or interactions with such people. What will they call it when whites do all they can to avoid other whites who demonstrate similar behavior? IMHO widespread, habitual drug use is at the core of much of the country’s decline and problem.
This was my first thought - someone knowing the son of the family, and that the parents were physicians, thought they could “score” some drugs. It is sad, if true.