Mehdi Masroor Biswas has been accused of being an Islamic State sympathiser. Mehdi Masroor Biswas has been accused of being an Islamic State sympathiser.

With the Union Ministry of Home Affairs (MHA) approving Karnataka's request to prosecute Mehdi Masroor Biswas, a sympathiser of the dreaded terror network Islamic State (IS), the Bengaluru Police are ready with 28,000-page chargesheet which will be filed before the designated court next week.

Mehdi Masroor Biswas (24) is facing multiple charges, primary among them being identifying himself with the IS and motivating youths, especially British nationals, to join network in its jihad, using his Twitter handles. He was nabbed from his home on December 13, 2014, after a British news channel blew his cover by exposing his identity. The Bengaluru Police had registered strong cases against him. However, the MHA's approval was necessary to file the chargesheet against Biswas.

"We have finally received the MHA's approval. Now, we will file the chargesheet against him next week. We have built a solid case. We had to prove how he conspired and helped the IS. Consequently, the chargesheet is one of the longest in recent times," a source in the Bengaluru Police said.

The chargesheet is supposed to be in excess of 28,000 pages. "It was a laborious process, as we had to record every detail of his activities on two different Twitter handles. We also had to include the incriminating evidence that we obtained from his laptop and smartphone. We have a strong case against him," the source added.

Biswas had used his Twitter handle @ShamiWitness to praise the IS work in the West Asian region and also to allegedly indoctrinate youths into the militant organisation's ideology. The police analysed his 124,000 tweets. Of these, 15,000 tweets were directly in connection with the IS --- defending their actions; praising their work (including the shocking beheadings); inspiring youth to spread the IS ideology and join the IS war in the West Asian region as jihadists voluntarily. Prior to this, he had tweeted on behalf of the IS under a different handle @ElSaltador.

In addition to these tweets, the police thoroughly analysed his laptop and his smartphone, as he operated his Twitter handle from his laptop as well as his smartphone.

The police recovered from his laptop 1.5 GB data, including IS propaganda material, such as pictures, videos, and other downloads.

Biswas has been charged under the IPC section 125 (waging war against the government of any Asiatic power in alliance with the Government of India) and sections 18 and 39 of Unlawful Activities (Prevention) Act.

An additional chargesheet is also being filed after the police found out that Biswas had appreciated the militant activities of the terrorists in Jammu and Kashmir. He had defended the Kashmiri militants as freedom fighters and glorified them as martyrs.

He had described Kashmir as Indian Occupied Kashmir and India as the aggressor in his tweets and direct messages to his followers.

"A special committee of retired judges of different High Courts formed by the MHA reviewed all these charges against Biswas before giving us the go-ahead. The National Investigation Agency is assisting us in this case," a senior officer of the Bengaluru Police said.