A Knock at the Door
- Episode aired May 14, 2018
- 45m
![Catching a Killer (2017)](https://m.media-amazon.com/images/M/MV5BZDEyOWEzNTctNzgyMC00MjhiLTliNmItOWViN2U4NjY3YzhkXkEyXkFqcGdeQXVyMTUyNjc3NDQ4._V1_QL75_UX190_CR0,2,190,281_.jpg)
Thames Valley Police investigate the death of 64-year-old Hang Yin Leung after six men ransacked her home. It's one of the most difficult homicides the detectives have investigated.Thames Valley Police investigate the death of 64-year-old Hang Yin Leung after six men ransacked her home. It's one of the most difficult homicides the detectives have investigated.Thames Valley Police investigate the death of 64-year-old Hang Yin Leung after six men ransacked her home. It's one of the most difficult homicides the detectives have investigated.