Pick up a 22 rifle and scope at wallmart, keeping in mind it's NOT A TOY!! Enlist the help of a friend with proper firearm safety knowledge. Take the weapon to an outdoor range or a safe wooded area and adjust the scope (while resting the weapon on something steady) so that you are able to shoot the eraser off a pencil from about 20 yards. For ammo, use basic "Hollow Point's" and just clock the stinker somewhere in back of his eye, aka "brain area". Warning: hitting him anywhere else will either rupture his stink bag (by direct puncture) or wound him, causing him to spray everything he's got inside... NOT GOOD!
If he doesn't have time to think and defend then the chemical will remain inside him. Then, carefully scoop with fishnet and deliver to the DEM guy that wouldn't come and get him when you called (they like to check their brains for disease.) Also, be sure there are no newborn baby skunks depending on it for survival because rotting animals smell worse than skunk spray, and linger even longer. Obviously, check your local laws first. "Pop goes the weasel"