The investigation into the death of former political aide Teoh Beng Hock must be concluded within a proportionate timeframe and not drag on, said lawyer Ramkarpal Singh Deo.

Ramkarpal, who represented Beng Hock's parents Teoh Leong Hwee and Teng Shuew Hoi, said this in response to the defence arguing that police do not need a specific timeline to complete a certain investigation.

"We have taken the position that there must be some finality. Otherwise, you will go on for...