1. Oklahoma law does NOT support the tenant, your on your own (basically).
1a if you refuse to pay rent in Oklahoma, it does not matter who is wrong or right, YOUR wrong.
http://www.tenant.net/Other_Areas/Oklahoma/tenant.html

2. There are Govt organisations that will help you but there about as worthless as nipples on a dead penquin.

Just as landlords are aloud to run checks on you, you can run checks on them. Get referances and call.