I'm in Lafayette and am hearing some public safety/emergency calls on 170.3. I think it is north of me, no Cajun accents. The PL is 82.5 if I remember right.
FWIW 170.3 MHz is not even allocated for voice. It's a narrowband data channel for federal/non-federal hydrological data. There are a number of these narrow band channels in this area of the band.
There's also a wireless microphone allocation at 170.3050 MHz. I wonder if someone is using that for some sort of low-power monitor or repeater. I've seen that before...