Allegedly the guy jumped off a roof when police came for him.
Vid...
https://www.periscope.tv/MacoDAYI33/1BdGYgdrPRXxX?autoplay&t=101
Does look like the guy but... Twitter.
Up to date:
http://www.dailysabah.com/investigations/2017/01/02/istanbul-police-launch-operation-to-capture-nightclub-attacker-in-zeytinburnu-district
Arrested a guy who jumped off the roof.
More details on the club attack.
Good photos of the suspect released.