Some say Arizona Donnie Clark was just an overprotective mother, but she's infamously known by this name
Death... [DOC] [TLE] John List, murdered his wife, mother, and 3 children, was caught by ... [PAR] Kate "Ma" Barker (born Arizona Donnie Clark; October 8, 1873  January 16, ... 
She poisoned 21 people including her own mother, children and husbands.