Whew. Wow! Nice! Gratz on finding him!
Have a drink and relax for a bit.
By systematically look around the room, I mean take an area of the room and look in/around everything, like a 4x2 area. Take it apart, and look in every inch of it. Put it back together then look in the next 4x2 area. 4x2 is an example, not an exact measurement. The important thing is staying calm. Yes you are emotional and panicking, but if you don't realize you are glancing at something and not analyzing it, you'll miss who you were looking for.
Gratz again and you'll know for next time.