Know connection of Jamia accused with Chandan Gupta

A 19-year-old youth created chaos in Jamia Nagar area by his actions on Thursday afternoon. Everything happened in presence of Delhi police when Jamia students were trying to hold protest march from the university till Rajghat. 

After the accused injured a student of Jamia Millia Islamia University, he was arrested by the police. The question here why did Delhi Police wait for him to open fire and then nabbed him? Also his actions were connected to Chandan Gupta. Here's all you need to know about Chandan Gupta.