The crowd in front of Saints Hospital were so focused on the arrival of the Chan siblings, that they didn't notice two things going on behind their backs.
The first was Ian seaking in with two bodyguards right under their noses.
He casually walked in through the employee entrance as if no one was around.
Of course this didn't completely go unnoticed as there were some bystanders who recognized him and managed to snap a few photos.
Most of these bystanders would post their amature photos of Ian walking into the hospital while simultaneously making fun of the reporters for being too distracted to notice him.
Had they realized that Ian was right behind them, they would have easily been able to corner him and possibly get more answers. On the other hand they were quite cautious as they knew that he was also Cedric's right hand man.