Sonic Judgement Episode 10

Zhang Zi Ming dies mysteriously from poisoning. An autopsy reveals he died from inhaling phosphine. During the investigation, the police discover that he had tampered with all the surveillance footage of Liu Wen Tao's community on the night of the incident, shrouding the case in mystery. Meanwhile, the DNA of Chen Lu, Liu Wen Tao's widow, is found in Zhang Zi Ming's residence, leaving the nature of their relationship a mystery. The police follow the clues and target Li Xiao Qing, Liu Wen Tao's ex-girlfriend. She confesses to sneaking into Liu's home through a window and switching his medication to get revenge, but it turns out she is not the actual cause of Liu's death. Jiang Cheng discovers through voiceprint analysis that the killer embedded high-frequency audio into Liu Wen Tao's frequently played playlist, triggering his cardiovascular and cerebrovascular disease to cause his death. The method is extremely covert and professional. The case gradually unfolds to reveal a bigger mystery. The killer not only knows Liu Wen Tao's living habits well but also has access to his devices. Su Ling Yu and Jiang Cheng realize that there may be a deeper scheme and a hidden mastermind behind all this. (Source: iQIYI)