Did Dehradun student who went missing from college join a terrorist outfit?

Shoaib Ahmed Lone was a BTech (IT) student at Dehradun’s Alpine Institute of Management and Technology. He left Dehradun on September 20. He said that he had a flight for Srinagar from Chandigarh. But he never reached home and went missing for days. Now, a picture of his posing with AK47 has come forth
The police are investigating the case and are trying to fathom if he had joined a terrorist outfit or not