Redneck joke

Thought I had heard them all:

Q: Why are redneck murders so hard to solve?
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.

.
.
.
A: All the DNA's the same and there's no dental records.

Heard that from Jeff Foxworthy on XM Comedy the other day.