Lana Clayton, who was described by friends as "a sweet lady," admitted to putting the toxic eye drops in her husband's water over several days in July, police said.
"Angie was actively trying to get home placement for her brother, but would not get support from our mental health system that she needed," victim's family says.
Police say Stephany LaFountain searched “Ways to kill human with no proof" an hour before calling 911 to report that her daughter couldn't breathe. Her first child died in a similar manner two years earlier.
Blair Ness was feeding his 16-month-old son when the boy's mother left for work. Soon after, he was stabbing the boy in the middle of a suburban Dallas apartment complex, police say.