It's a little hard over the translation gap to understand why the account was locked... Am I understanding correctly that Twitter interpreted sharing detailed information about a murder victim as doxxing? https://help.twitter.com/en/rules-and-policies/personal-info...
So then, "Claiming that the tweet was in violation of provisions of the Juvenile Justice Act and the Protection of Children from Sexual Offences (POCSO) Act, the National Commission for Protection of Child Rights (NCPCR) had asked the Delhi Police and Twitter to take action over Rahul Gandhi posting the photo of the girl's family on the microblogging website." [1]
Then, I think a bunch of other members of this party started posting the picture in protest, and also have been banned.
I think Twitter has claimed that the image isn't just illegal, but also violates their policy.
[1] https://www.indiatoday.in/india/story/dalit-rape-murder-rahu...