The Wolverines improve to 8-3 on the year while the Warriors fell to 5-9.
"It's a win," WRV coach J.B. Neill said. "I'll take a bad win anytime. North Knox deserved to win this game because we did nothing to help ourselves. I'm not taking anything away from them, but I think it's a good example of a little hangover from the Greene County Invitational."
Fisher also had a hand in helping the WRV defense all but erase any hope North Knox had to at the very least force an extra session.
With North Knox's leading scorer on the night Jordan Meurer (15 points) attempting to move the ball up the court, Fisher stuck a hand into the sophomore's path and stripped the ball.
He then took control and drew a foul with 2.5 seconds remaining but was unsuccessful in either attempt. That left a final defensive stand up to the WRV defense.
"It just seemed like we had a chance to put them away we'd miss free throws or we'd turn it over," Neill said. "It never went completely right from the end of the JV game to the varsity game."
When the Warriors attempted a court length pass, Hill stepped in front of the ball and hung on as the final buzzer sounded.
"We did everything we could to hand it to them," Neill said. "We had a kid or two step up and got the win."
While it wasn't until Fisher's deciding tosses at the charity stripe ultimately decided the final tally, the middle two quarters provided hope for both teams chances at earning a win.
In the second quarter White River Valley erased a slim 12-11 North Knox lead by taking an 11-8 advantage in the period and hauling a 22-19 edge into the intermission.
But a reversal of fortune in the third period saw the Warriors take an 11-8 cushion in the frame and force a 30-30 deadlock on the scoreboard with eight minutes to go.
WRV muscled their way to a 17-15 advantage in the fourth quarter. That's also when the Wolverines made their final charge to the lead and then hung on.
Before Fisher's heroics in the closing seconds, the Wolverines had to work their way back from a three-point deficit early in the quarter and survive a pair of Meurer baskets that cut the lead to one before Cole Bond's wing jumper at the 2:12 mark forged the final deadlock.
His long distance trey was the last of three registered and evened things at 45-45. It was also the last time the Warriors had the ball at WRV's end of the court.
"It's a win you can put in the books and that's what we're going to do," Neill said. "We'll get on the bus and get out of here."
The Warriors prevailed 33-27 in the junior varsity contest despite 12 points from Colten Gregory.
Jonathan Koenig and Hunter Cornelius finished with three each for WRV while Cody Ault and Jorden English added two each and Conner Hill one.
White River Valley returns to action Friday that's when the host Shakamak in a Southwestern Indiana Athletic Conference contest starting at 6 p.m. with the JV game.
WHITE RIVER VALLEY (47) -- Mitch Ingram 4-9 0-0 6, Luke Mowery 3-5 3-5 9, Michael Fisher 4-9 5-11 14, Trey Gamble 1-1 0-0 2, Cade Hill 4-8 4-6 12, Jorden English 0-0 0-0 0, Nick Johnson 2-2 0-0 4, Jonathan Koenig 0-0 0-0 0, Justin Barnett 0-0 0-3 0. Totals 16-30 12-25 47.
NORTH KNOX (45) -- Cole Bond 3-5 0-0 9, Jake Alsman 0-0 0-0 0, Wacey Robertson 1-1 1-1 3, Christopher Graman 4-11 2-2 13, Jordan Meurer 5-11 4-7 15, Luke McKinnon 0-1 0-2 0, Mark Martin 2-2 0-1 5, Shanson Lamb 0-0 0-0 0. Totals 15-31 7-13 45.
White River Valley 11 11 8 17 -- 47
North Knox 12 7 11 15 -- 45
3-point shooting -- White River Valley 3-8 (Ingram 2-5, Fisher 1-2, Hill 0-1), North Knox 8-22 (Graman 3-9, Bond 3-5, Meurer 1-5, Martin 1-1, McKinnon 0-1). Rebounds -- White River Valley 24 (Mowery 5), North Knox 14 (Bond 3, McKinnon 3). Steals -- White River Valley 7 (Fisher 3, Hill 3), North Knox 4 (Meurer 2). Blocks -- White River Valley 1 (Hill), North Knox 3 (Robertson 2). Turnovers -- White River Valley 11, North Knox 10. Total fouls -- White River Valley 15, North Knox 19. Fouled out -- Ingram, Alsman. Technical fouls -- Ingram. Junior varsity -- North Knox 33, White River Valley 27.