Photo evidence still isn't a guilty verdict. It's probably sufficient evidence in my non lawyer opinion to keep him in holding rather than let him out, but being in prison awaiting trial/guilt is significantly different from being in prison because he's been found guilty.

It's generally better to keep people out of prison while awaiting trial as much as possible, because that holding in and of itself is involuntarily detainment, just for a charge, and can seriously disrupt a persons life. If someone isn't guilty, it's not fair to punish them in that way. As such, it's basically a judgment call on how likely they are to be guilty and/or appear for trial.

That said, the paper just published his name and charge so he's getting screwed regardless, if not guilty. Though he's probably guilty in this case unless there was some sort of police procedure for obtaining evidence that wasn't followed.