The Perfect Alibi!

Merited anti-narcotics policeman Li Jianguo died suddenly of a heart attack in his home study. The police initially ruled it an accident. His daughter Li Xue firmly believed that her father died of murder because he was preparing to make a will and leave a huge amount of assets to her before his death, and he had just been diagnosed with "early Alzheimer's disease." Li Xue investigated secretly and was shocked to find that her father did not have Alzheimer's disease at all, he was pretending to be ill! This policeman, who once walked on the edge of a knife, used counter-investigation methods to exert absolute control at home after retiring, trying to use "faking illness" to transfer assets and abandon his current wife. The real murderer is Lin Wan, the seemingly weak stepmother who has been subjected to domestic violence for a long time. She keenly grasped the old detective's psychological blind spot of pretending to be ill, and used an extremely covert method (replacing daily antihypertensive medication) to complete the counter-killing. Faced with the truth about the "heroic father" and the "murderous stepmother", Li Xue struggled between morality and law, and finally chose to hand over the evidence to the police, and produced evidence of his father's long-term domestic violence to win a lighter punishment for his stepmother.