[From here]

By the time Izaya exited his own hall, he was already starting to reconsider having left Snow back in the room. He would have to be a little more cautious in his treatment of Villiers for the time being since they'd become roommates, but that didn't mean he couldn't get some use out of the arrangement. Villiers was a big, strong guy, so he'd surely make for a big, strong shield as well...

Izaya slowed to a stop on one side of the hall, keeping a lookout as he considered turning back to see if Snow had any plans, or at least waiting until Snow followed this way. He could always say that he was concerned for their mutual safety, that he was worried about going out alone tonight; Snow would probably buy it. Who wouldn't, in such an unusual place as this?

As he was still weighing his options, the beam of Izaya's flashlight crossed a familiar figure.

...Well, there could be another possibility entirely.

"Ippo-kun?" Izaya called out, trying to get a better look at the boy without leaving the post he'd taken up. "Is that you?"