Lam was a senior figure in the Democratic Party. His political career started in 1999 when he joined the Party and became assistant of former Hong Kong lawmaker Albert Ho. He left the party in 2006 to join the Independent Commission Against Corruption (ICAC) as an investigator and he returned to the Democratic Party as chief executive in 2011.
In the mob attack that took place inside Yuen Long train station on 21 July 2019, Lam suffered an injury to his mouth that required 18 stitches while he was filming the incident but later on was arrested for rioting.
He was prosecuted by the Independent Commission Against Corruption (ICAC) for allegedly disclosing the personal information of individuals being investigated by police in relation to the Yuen Long mob attacks in July 2019. He pleaded not guilty on 27 April 2021.
Lam was arrested in January 2021 under the National Security Law for participating in an unofficial election primary which was held in July 2020.
Currently charged under conspiracy to commit subversion.
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Information provided by Hong Kong Watch