CID Shankar is a 1970 Indian Tamil-language spy thriller film, directed by R. Sundaram, produced by Modern Theatres and written by A. L. Narayanan.

[5] The film begins with a politician being killed by a suicide bomber, who detonates her explosive belt.

C. I. D. Ashokan also stays at the town, who poses as an herbal researcher, his close relation is lover's club dancer Reeta.

Ashokan finds out the truth, and he goes to Nagamalai estate, where he gives a lift to a young girl who explodes her belt.

Shankar was introduced to Boopathy by himself as an herbal researcher who gives the helpful information of the drug's details.

Finally, Shankar is against gun fighting with the gang, and in this shooting, Boopathy dies and saves Vidya's life.