Saturday's bout saw the British advance his records to (11-0, 10 KOs) by knocking out Harrison in the fourth round, winning the WBO Global heavyweight belt in an undefeated streak.
Lartey (14-2, 11 KOs) had stood his ground at times and landed some powerful shots that pushed Dubois back.
But in the fourth, Dubois landed a huge right hand that dropped Lartey, who struggled to get to his feet and the 10-round fight was waved off in a disappointing moment for the latter.
Richard Lartey only got to Britain just two days before the fight due to the delay in securing a UK visa.
Lartey has built an international profile after defeating champions from Burkina Faso and Kenya but Dubois was far too busy and dominant for a boxer fighting in Europe for the first time.
Dubois was recently ordered to face Joe Joyce in a British heavyweight title showdown, but there is no word if the contest will actually happen - despite the British Boxing Board of Control announcing a deal had been reached.
Dubois wants the fight to happen, but Joyce has much bigger goals in mind - like world title shots.
Both Dubois and Joyce are promoted by Frank Warren. Read Full Story

Facebook
Twitter
Pinterest
Instagram
Google+
YouTube
LinkedIn
RSS