2-3 minutes on the roof with a gun. He was spotted with a backpack long before that, and he was also spotted using a rangefinder from the ground long before that.
That’s part of the reason the cop was looking for him in the first place. That’s also why there is a cellphone picture of him on the ground taken before he climbed to the roof, which was taken by an officer that saw him using the rangefinder.
Who is saying 30 minutes? I’ve only seen reports saying two or three minutes, I wouldn’t doubt that though.
EDIT: new info has come out, it’s pretty absurd
2-3 minutes on the roof with a gun. He was spotted with a backpack long before that, and he was also spotted using a rangefinder from the ground long before that.
That’s part of the reason the cop was looking for him in the first place. That’s also why there is a cellphone picture of him on the ground taken before he climbed to the roof, which was taken by an officer that saw him using the rangefinder.