I just heard Air Evac dispatch give out the frequency and tone for the Brownwood tower.
460.650 DPL 331
This is different than what is in the database.
I found this old post and thought I would add that during a band opening a while back I found the correct frequency and tone and submitted it. The database listing is currently correct (461.275 PL 141.3) but I would not be surprised if they move from UHF to VHF in the future.
I'll add that to my scanners for the next time I'm down that way. Probably out of range of the base, but maybe catch the copter in the air, and see if I can catch a tone or code.