Livingston boss Mark Burchill branded winger Myles Hippolyte’s actions unacceptable after the Englishman was sent off for lashing out at Dumbarton’s Fraser Wright.
The Lions dropped to the foot of the Championship after their seventh defeat this season, Alloa’s point picked up at St Mirren seeing Danny Lennon’s side leapfrog Livi into ninth.
And despite having dominated for long spells, Hippolyte’s indiscipline after 71 minutes swung the match in the home side’s favour as Eamon Brophy capitalised on his side’s numerical advantage to fire the winner eight minutes from time.
Gary Glen’s first goal of the season had earlier cancelled out Kevin Cawley’s opener a minute before the interval.
However, Burchill was visibly angered by Hippolyte who kicked out at his opponent in the second half with the scoreline delicately poised at 1-1.
“If we keep 11 men on the pitch we win the football match,” Burchill explained. “It’s completely unacceptable what Myles did, a kick off the ball, it’s the worst red card you can get as you let your team-mates down, the club, the fans, especially when it was complete and utter domination from our side.”
“He’s apologised but it’s too late for that.”
Liam Buchanan looked lively in attack and the striker’s half volley across goal brought the first opportunity.
Livi cranked up the pressure on the half hour mark, full-backs Jackson Longridge and Ross Millen asserting themselves down the flanks.
But it was Millen who was reluctant to close down Willie Gibson five minutes before the break and from the winger’s cross, Cawley steered his header beyond Marc McCallum from just inside the six-yard box.
However, Millen redeemed himself minutes later after winning a corner for his side. The defender then picked out Declan Gallagher at the back post who headed the ball back across goal for Glen to prod home from just a couple of yards.
Hugo Faria went close with an effort from 25 yards after the break before Hippolyte’s stupidity had referee Nick Walsh reaching for the red card.
Substitute Kieran Gibbons brought out a fine save from ex-Hibs goalkeeper Mark Brown in the Sons goal before Brophy stole in at the near post to win it for Stephen Aitken’s men.
Dumbarton: Brown, Saunders, Buchanan, Barr, Wright, Gallagher (Kirkpatrick 49), Routledge (McCallum 82), Brown, Gibson, Cawley (Brophy 42), Fleming. Subs: Ewings, Docherty, Ross, Waters.
Livingston: McCallum, Millen, Gordon, Gallagher, Longridge (Neill 66), Glen, Pittman, Cole (Hippolyte 46), Faria, Buchanan, Sheerin (Gibbons 72). Subs: Jamieson, Georgiev, Mullen, White.
Referee: Nick Walsh.