Hi JH, I don't want to get in Wolfe's way here but I thought a few hopefully nonintrusive suggestions might help you start on the road toward where you might want to go. This has good potential as the plot of a potboiler, and there are some simple things I think you could do to make your task easier. These are just suggestions from me, if you or Wolfe think I am interfering with your voice just tell me to quit it, I'll happily bug off.
First, look at what Wolfe just said. Fully half of your current sentences/clauses are passive. At the same time, 50% of your main paragraph needs to be reduced. Think there might be a connection?
Let's start at the first sentence. Who discovers the nude body of Bree Ballard? Well, as Wolfe implies they are going to be golfers or (more likely) greenskeepers. But who finds the semen samples on her? Is it not the authorities who do so? Now, hold that thought. Notice how much space is chewed up by the business of the finding of the body, the response to the call, the feelings of the sheriff, and what amounts to backstory? Nearly all of this is surplusage that should go. If you make the authorities (i.e. the sheriff) the subject of the first sentence, you can move the DNA samples to the front, get rid of the passive voice, remove a line of currently needless detail, and tighten up the passage by a lot. Wolfe has already given you an example of a crackerjack opener. Try to do that with the semen. You'll note that Wolfe has already suggested this in passing.
I am not sure why you want to name the corpse and the sheriff. I would remove all four words in the names and refer to the corpse as "a former beauty queen" for now. I am not sure why you need to say the sheriff moves quickly to find the killer, why there is a political time bomb (no politicians involved so far--and beware of trite expressions), and why it is about to explode. You do have an interesting stew based on the body evidence, but stay on target and develop what you have in front of you, rather than alluding to things not yet evident. Or, if you really need them, make them evident.
Thank you for your attention.