Bishnoi is in the custody of the Cell, which is expiring Sunday and the police might seek an extension of the remand.
Moosewala, 28, was shot dead on May 29 while he was travelling in a car and around a dozen assailants fired over 30 shots at him.
Delhi Government Standing Counsel (criminal) Sanjay Lau said the petition was not maintainable in Delhi.
After his murder, Bishnoi had written a Facebook post to avenge the death of Middukhera. Bishnoi had written that Middukhera was his friend, not an accomplice.
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