EP247: Marybeth Tinning: Serial Killer Mom

Marybeth Tinning murdered each of her children in cold blood. The
motive was that she enjoyed the sympathy and attention she received
when her children brought to the hospital.The causes of death for
Tinning's first eight children was initially thought to be genetic.
Even when her sixth child, Michael – who was adopted and not
of blood relation – died in 1981, authorities failed to open an
investigation.