In its arguments on framing of charges before District Judge S K Sarvaria, the prosecution said suicide notes written by Geetika are the strongest piece of evidence against the accused.
Additional Public Prosecutor Rajiv Mohan also said the suicide notes written by Geetika's mother, who committed suicide on February 15, also point towards culpability of Mr Kanda and Ms Chaddha.
The submissions were opposed by Mr Kanda's counsel.
The court has fixed April 2 for hearing further arguments. Both Mr Kanda and Ms Chaddha are accused of abetting Geetika's suicide. She was found dead at her Ashok Vihar residence in Delhi on August 5, last year.
In her suicide note, Geetika had said that she was ending her life due to "harassment" by Mr Kanda and Ms Chaddha.
Geetika's mother Anuradha Sharma also committed suicide and had left behind two notes in which she blamed the duo for driving her daughter to take such an extreme step.
In its main and supplementary chargesheets, Delhi Police has said Kanda was obsessed with Geetika and wanted to bring her back in his company to sexually exploit her.
Mr Kanda and Ms Chaddha have been chargesheeted for abetment of suicide, criminal conspiracy, criminal intimidation, forgery of valuable security, forgery with intention to cheat and harm reputation, using forged documents as genuine and destruction of evidence under the Indian Penal Code (IPC).
They have also been booked under Section 66 of the Information Technology Act which deals with computer hacking.