They dragged her to the rear of the bus and beat her with the rod. Nirbhaya was raped by all six of them one by one. The cruelty didn't stop, a rod was suspected to be used for penetration which caused serious injuries to her abdomen, intestines, and genitals.
Why? What is this brutal act for? Just because they couldn't control their lust, they decided to ruin her life, her dreams, her existence? Those unheard screams, unseen tears, and unbearable pain are much beyond our imagination equivalent to just being dead. Not for once did they realize she is someone's daughter, someone's sister, and above all, that she is not a public property to touch without her consent.