Because somebody shot a big bull, two different law enforcement agencies spent time and money because it just had to have been poached. And they used facial recognition technology to find him and some futuristic forensic techniques that proved it was shot at night?
Rigggggghhhhht.
There is a well told story in Idaho (actually, it's a classic urban legend, told and retold) that goes like this: Warden stops a hunter at the check station, looks at the animal, busts the hunter for poaching. How did the warden know it was illegally harvested? "Animals shot at nighttime will have dilated eyes because of the spotlight...."
Total horse ba-hookey.