Investigators claimed they have collected evidences which establish harassment of Geetika Sharma by Kanda.
The police custody of Kanda, who surrendered last Saturday, ends tomorrow.
A senior police official said they will seek extension of his custody.
Geetika allegedly took her life on August 5 in her Ashok Vihar residence alleging that Kanda and his aide Aruna Chaddha harassed her.
Investigators had claimed that the suicide notes they recovered were written on the same day though they bore two dates.
After an analysis of the notes in which Geetika alleged harassment by Kanda, police said they were written by the deceased the same night she took her life.
Confusion arose as one of the notes had a May date while the other had August date.
Investigators also said Kanda denied all allegations against him and told them that he was not in touch with Geetika for at least 45 days before her suicide.
He also claimed that Aruna, whom Geetika had named in her note, had called her parents on her own and asked her to join duty.
Police are also in touch with Ankita whose name also appear in the note. She is out of the country and police expect to question her soon.
