Lease problem / dilemma

[AquaPython]

ok, last night i got a signed lease for my GF's house. a family of 4 was to rent it for a year starting next friday.
so today we try to call him and his phone number has been disconnected.

what action to take? if any?

no money has changed hands, that is supposed to happen next thursday night, with the key exchange.

i sent him an email at 5pm today saying the line is disco'd and to call a given #. obviously a variety of things could have happened here, and waiting till tomorrow pans out to see what to do.

i figure two most likely solutions are :
1) money is tight, he didnt pay his phone bill, and it got disco'd. all will proceed according to plan.

2) worste case, he dissappeared on purpose. either the wife didnt like the house or they found something else between 8pm last night and 4pm and today.

one mistake made is that there was no drivers' license taken, or background check. However, i do have :

First Name
Last Name
(wife's first name and last name and signature on the lease)
job position,
name of employer
employer address - hmm, show up ?
city , state, zip
direct line
bus. line
bus. extension
fax
business email
employer website


what do you do?