In a stay family, there was an old feud between two brothers over the family inheritance. One brother, filled with greed, poisoned the other brother's family during a family gathering. He put the poison in the food, which was served to everyone except himself. As the family members started getting sick and dying one by one, he feigned shock and grief. However, the police eventually discovered his motive and evidence of him purchasing the poison, leading to his arrest.
One stay family murder story could be about a family living in a large mansion. The husband, who was facing financial ruin, decided to kill his wife and children to collect on their life insurances. He planned it meticulously, making it look like a burglary gone wrong. He disabled the security system, then used a weapon from his own collection to commit the heinous act. But the police grew suspicious when they found out about his financial troubles and the lack of signs of a real break - in.
There was a stay family where the son had some serious mental issues. One day, without any warning, he snapped and attacked his parents and siblings with a kitchen knife. He was delusional, thinking they were out to get him. Neighbors heard the screams and called the police, but by the time they arrived, it was too late for some of the family members. The son was then taken into custody and sent for psychiatric evaluation.