Maguire was found guilty of aggravated assault, resisting arrest and repeated attempts of bribery following a brawl on the island of Mykonos but has since been granted a full retrial.
United confirmed in an official statement that the 27-year-old had been successful in appealing the 21-month suspended sentence he was slapped with on Tuesday.
The Red Devils have continued to support Maguire throughout the proceedings and Rooney, the club’s all-time record goalscorer, has followed suit by backing the England international.
‘Knowing Harry the way I know him, it’s completely not his character,’ former United striker Rooney told talkSPORT.
‘It’s out of character, everything that was reported to have happened.
‘I couldn’t get my head around how it went to court, he was found guilty and sentenced all within the space of about two hours… how has that happened?
‘Harry’s not that type of person at all. He was out there with his girlfriend, his family and friends and their girlfriends, so it’s not a group of lads, where sometimes things happen.
‘So, in my opinion, something has gone on that has maybe provoked him.
‘It’s just out of character, it’s not him at all. I just think as a nation, as people, we are too quick to judge.
‘Obviously he was found guilty and there’s an appeal, so at the minute there’s no charges now against his name until the next court date.’
Rooney hit back at those claiming Maguire put himself in a vulnerable position by refusing to just stay in his villa while on holiday.
‘Obviously I’ve made my own mistakes and I’ve had my issues with the law, both in England and abroad as well, so I know how difficult that can be,’ he added.
‘But I just think with Harry, he’s not that character at all.
‘I’ve also heard people saying why doesn’t he hire a villa and stay in a villa, but why should he? He’s a human being!
‘You don’t think like that, when you’re out with your girlfriend or your wife you don’t think of any trouble occurring. So for me something’s gone on that isn’t right, and as a human being you might react.’