The prosecution told the court that they had recovered a mobile of Priyanka Taneja (36), alias Honeypreet.
The prosecution also told the court that Honeypreet had provided incriminating evidence in the case.
Honeypreet, along with Sukhdeep Kaur, was arrested from Zirakpur-Patiala road in Punjab on October 3.
Honeypreet topped a list of 43 people "wanted" by the state police in connection with the violence.
Haryana Police had on September 1 issued a look-out notice against Honeypreet and another key aide of the Dera chief, Aditya Insan, following apprehensions that they might try to "escape from the country".
An arrest warrant was also issued against Honeypreet, and two key Dera functionaries Aditya Insan and Pawan Insan, after Haryana Police moved an application in Panchkula court.
Her name has been included in a FIR in which Dera functionaries Aditya Insan and Surinder Dhiman, among others, had been booked on the charge of sedition, inciting violence and arson, the police had said earlier.
Following the conviction of the Dera chief, violence had erupted in Panchkula and Sirsa, the Dera headquarters, which claimed 41 lives and left scores of people injured.
The Dera chief has been sentenced to 20 years in jail for raping two women and is now lodged in jail.