Two teens are in custody while police in Oklahoma City are searching for several more teens involved in a brutal attack on a homeless man who was left for dead, according to a report.According to court documents obtained by KFOR, a homeless man identified as Tilman Shannon was jumped and nearly beaten to death by a large group of teens on May 26. Surveillance video captured the whole ordeal and revealed several teens yelling and threatening Shannon from a vehicle.Shannon is seen trying to run away but is beaten down near the dumpster at the opposite end of the parking lot.TENNESSEE