Caught Witness to a prosecution. Just finished the whole of 22 episodes.

洗冤录

Bobby Au-yeung as Sung Tsi (宋慈)
Frankie Lam as Sung Yik / Fong Chun (宋翊 / 方俊)
Jessica Hsuan as Tong Sze (唐思)
Mariane Chan as Lip Fung (聶楓)
Michael Tse as Sit Dan (薛丹)
Lo Mang as Cha Siu-chaan (查小燦)
Gordon Liu as Lip Yan-long (聶人龍)
Lau Kong as Ma Gwai (馬貴)
Eileen Yeow as Lam Choi-dip (藍彩蝶)
May Kwong as Princess Sum-yu (心如郡主)
Benz Hui as Sung Sing (宋誠)
Mimi Chu as Lo Fa (魯花)
Ma Tai Lo as Sung Ling (宋玲)
Anderson Junior as Tenth Prince (十王爺)
Fung So Bor as Princess of Hong (康王妃)
Lee Lung Kei as Lam To (藍濤)
Lo Chun Shun as Choi Chuen (蔡全)
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For 30 years, nighttime keeper Sung Tsi (Bobby Au-yeung) was despised in To Yuen village due to his posthumous birth in a coffin, having only the sickly scholar Sit Dan (Michael Tse) and the coolie Cha Siu-chaan (Lo Mang) as his friends. After disputing with the village chief over his family's land, Tsi, along with a homeless female thief Tong Sze (Jessica Hsuan), are accused as murderers and are sentenced to death. The village's newly appointed judge Sung Yik (Frankie Lam) finds the case suspicious and investigates the case himself. With the help of the mysterious experienced coroner Ma Gwai (Lau Kong), Yik successfully revokes Tsi and Sze's sentences. Gwai becomes Chi's coroner master, and Yik employs Tsi to be his personal forensic medical doctor. The two become good friends, successfully solving many murder cases in town. Sze develops an obvious crush on Yik, unaware that Yik and Lip Fung (Mariane Chan), daughter of senior constable Lip Yan-lung (Gordon Liu), are already in a close relationship. Tsi, on the other hand, falls for Lam Choi-dip (Eileen Yeow), the spoiled daughter of rich merchant Lam To (Lee Lung Kei). Choi-dip, however, has her eyes on Yik.
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Several months later, a man also by the name of Sung Yik shows up and confronts Yik, accusing him as a traitor. After the two intensely quarrel, the current Yik accidentally kills the real Sung Yik. In a panic, he buries Sung Yik's body in the garden of the Sung family rice shop. Yik's relatives then mysteriously die one by one; Tsi eventually uncovers the body of the real Sung Yik and begins to grow suspicious of the current Yik, a man whom he has always respected and treated as a friend.