My brother was attacked by a group of drunk men, leaving him with a swollen face. We’ve already sought medical attention and filed a complaint. What legal steps can we take against them?

You can pursue legal action against the attackers under sections related to assault and causing hurt in the Indian Penal Code. You can file a private complaint in a magistrate’s court or seek police action under Section 156(3) CrPC for investigation and prosecution of the accused.