A few clicks on his computer and L was able to pin point Matt's exact location.
"Watari." He said, the old man making his way across the room to stand behind L who was crouching on a chair in front of a large computer screen. "It seems one of the successors is in trouble." Trouble he got himself into but trouble none the less. "I need you to pick him up and bring him here. I will send you the address."
Watari was already turning on his heels to go find Matt when L spoke again, "And Watari, please bring my mask." Because the Wammy kids had yet to see L's face and that wasn't going to change now.
Before leaving, Watari set L's mask down beside him on the desk and when the door was shut, L placed the mask over his face.