http://home.houston.rr.com/freqzone/freqs/hou_freq.html
If it is conventional you can find it here. Please bookmark it as you seem to look to the forums quite often before looking around a little. This is Myle's site, and it is full of conventional non-trunked radio information from the Houston area.
http://home.houston.rr.com/freqzone/freqs/star-net.html
If it is on the STARNET system, it can be found here. Please bookmark it as well and search around a little before posting on the forums.
In this case, there are two conventional repeaters, not trunked, in use by UTMB Police. They are:
UTMB Police RX: 460.2500 TX: 465.2500 PL: 146.2
UTMB Police RX: 867.2750 TX: 822.2750 DPL: 156