[citation needed] He was ordained for Priesthood at St.Thomas Forane Syro-Malabar Catholic Church, Mattom, Thrissur, Kerala on 21 April 1990.
[8] He also serves as the Secretary of the Regional Bishops Conference of North India and Consultor for the Pontifical Council for Interreligious Dialogue.
[9][10] In June 2018, a nun accused the bishop of rape, and a complaint was filed with the Kerala Police under Section 164 of Code of Criminal Procedure (CrPC, India).
[11] The nun alleged that she was raped by Mulakkal thirteen times between 2014 and 2016 during his visits to St. Francis Mission Home, Kuravilangad.
In his complaint, Mulakkal said that a nun was blackmailing him after he took disciplinary action against her, including transferring her, and that her family members are threatening to entrap him in rape case.
The Kerala High Court rejected the bishop's first application for bail, citing prima facie evidence in the case.