David Krystyniak lived at home with his mom, Judith, for decades, and police said that they were aware of some "erratic behavior" from him in the past.
“Not only did he fall in love with her, he became obsessed with her — to the point that she’s all that mattered," the prosecutor said of Grant Amato's love interest.
Yesenia Casiano's children allegedly watched as she punched her boyfriend and bit off part of his thumb — which the kids later pointed out on the floor to investigators.
Samantha Grace Vaughan allegedly reacted with racism and violence after investigators approached her in a nightclub and asked her about her son, whom she had left in her car outside.
Authorities said Ashley Barner admitted to intentionally leaving a candle near a yarn doll in a bedroom of the home — and implicated her grandmother in the plot as well.