The DGP appeared before a bench of justices Raghavendra Singh Chauhan and Satyanarayana Murthy, which was hearing a petition filed by Congress leader V Narendra Reddy in connection with the police detaining Revanth Reddy in the wee hours of Tuesday.
The bench obtained a clarification from the DGP on the practices regarding the gathering of intelligence inputs, required for the arrest of public representatives and politicians.
In the early hours of Tuesday, the Vikarabad police had taken Revanth Reddy into preventive custody, citing law-and-order issues.
The Congress leader's arrest came ahead of Telangana's caretaker Chief Minister K Chandrashekar Rao's public meeting at Kodangal.
He was let off later, but only after Rao's meeting at Kosigi in the said Assembly segment got over.
The DGP explained that communications within the department did not bear the official seal and not mentioning the date was a human error.
The bench then adjourned the hearing in the case to December 17.
(With inputs from agencies.)