In his application, Manikavasagam also wants the court to order the police officer to reveal why it took him a long time to investigate the death of television actress K Sujatha.
Sujatha died in June 2007 and Manikavasagam has for long been claiming that Vell Paari was implicated in the death. He further claimed that Kumaran was slow in investigating the matter as a result of his close ties with Samy Vellu and Vell Paari.
Vell Paari had denied the accusation and Kumaran had filed a defamation suit against Manikavasagam over the claims.
Manikavasagam's application sought for the questions to be answered at the next stage of the defamation suit. The matter will be mentioned on March 5.
Sujatha's inquest is set to be heard from March 16 to 18.
After filing his application, Manikavasagam also said that he would be going to the federal police headquarters in Bukti Aman next week to urge disciplinary action against Kumaran "for his relationship with Samy Vellu".