[16] Mehta initially wanted to make it as a feature film, but as he continued the research, he realised that he could not fit the content in that length.

Mehta decided to focus on actors from theatre background, without being influenced by the need to have recognised faces from Hindi film industry.

Shefali Shah, Rajesh Tailang, Adil Hussain and Rasika Dugal were a part of the prominent cast members in the series, with whom Mehta worked in their first feature film Amal (2007).

[16] The character of Vartika Chaturvedi (Shefali Shah) was based on Chhaya Sharma, the former deputy commissioner of police in Delhi.

[18] Shefali Shah agreed to don the character after Mehta's narration spanned for five minutes and also met Sharma for the preparation of the role.

Neeraj Kumar, for whom Mehta conceived the idea of the script stated that he advised the producers not to involve my successors who would neither approve of the project nor would they give any support, since the case was their predecessor's — a common failing observed in the police.

"[29] Shubhra Gupta of The Indian Express wrote: "Where Delhi Crime scores is in the portrayal of a beleaguered police force, which is easy to point fingers at.

"[31] Piyasree Dasgupta of HuffPost noted that the series "comes across as such an elaborate exercise to valorise the Delhi Police that it actually seems deeply insensitive."

"[32] Rahul Desai of Film Companion wrote: "It's the tiny infusions of well-informed opinion into what is essentially dramatic long-read reportage that make Delhi Crime one hell of a ride.

"[33] Rohan Naahar of Hindustan Times called it: " gut-wrenching, stylishly directed, passionately performed, and most important, not at all exploitative.

It might absolve the Delhi police of its alleged dereliction of duties, but it is also a reminder that we vouched, and hoped, for a similar incident to never happen again.

Priyanka Roy of The Telegraph said: "And while the rest of it is worth a watch, Shefali Shah is reason number one why you shouldn't give Delhi Crime a miss."

Nandini Ramnath from Scroll wrote: " Rajesh Tailang, Anurag Arora, Adil Hussain, Jaya Bhattacharya, Gopal Dutt and Vinod Sharawat are among the numerous actors who display the same dedication to their craft as did their fictionalised selves to the investigation.

"[36] Namrata Joshi from The Hindu said: "Tailang's control, poise and measured way plays out beautifully against Shah's dynamism to give us arguably the best on-screen buddy-cop team seen yet in India.