The Times of India quotes the chargesheet:

"Accused Biswas ... was well aware of the fact that ISIS is known for its well-funded web and social media propaganda ... regularly taking advantage of the social media, particularly Twitter, distributed his messages by organizing hashtag campaigns, encouraging tweets on popular hashtags (IS related), and utilizing software applications that enable IS propaganda," read the chargesheet.

The chargesheet accused Mehdi of allowing his account to become a meeting place for ISIS supporters and even introduced top leadership.

His lawyer says:

Describing the chargesheet as "contrived", Biswas' lawyer and member of the Association for Protection of Civil Rights, Akmal Rizvi, said, "On March 23, the same police team told the court that they had no evidence to show that Biswas had committed a terrorist act. How has all that changed in just a matter of 45 days?"

More from the Bangladore Mirror here.

Free Shami Witness. He was an ISIS fanboy, a news disseminator and aggregator. Shami Witness did not recruit for ISIS. He was not a member of ISIS. There's no indication he got his information from any official ISIS source. He was followed by many Western militants, researchers, analysts, journalists and bloggers because of his reputation as being knowledgeable and because (1) his English was very good and (2) he knew who to follow on Twitter to get and tweet out the news faster than most. There's no indication he was paid or compensated by ISIS.

Yes, he took ISIS' side in his tweets. But he also disagreed with them at times. Yes, he communicated with some British ISIS fighters and retweeted the accounts of ISIS fighters. Yes he is a propagandist of ISIS views.

But expressing one's support for an unpopular group one isn't a member of and hasn't provided tangible assistance to should not be a crime.

As to his tweet about the Turkish border, here's what happened. A reflexive response to an inquiry for information about borders should not be enough to convict someone of waging war, giving material support to a terror group or mis-using computers.