Go up on the aquarium elavator, and when ur up there then stay. Click the elavator to go down and then when u can click it up click it. THen jump down into the bowl shaped thing below and wait for it to go up. When it is up the jump out and climb up the ladder, walk through the hall and PRESTO!! There he is!

To find the janitor you take the elevator up to the highroller floor then you activate the elevator to go down. When the elevtator is down u press the button to bring it up, as it is comin up, you jump in th bowl at the top (fast) however, you can't jump in it when the top is down, you have to do it while it is comng up. The elevator will then take you up to the a room. Climb the ladder, walk through the hall and chase him out to the other room through the doors.