I have been dating a guy for over a year that"Supposedly" used to beat the sh*t out of his previous girl friend. He has never raised a hand to me and has only once or twice raised his voice to me. So for me if he did beat his previous gf than yes they can change bc he does not abuse me.
with mine it took a little over two years for his ''unsavory'' trait to come out... just takes the right circumstances and he could go off like a bomb... just be careful. in my case, he had a 'bad day', i had dinner ready after working 14 hours at my job, for when he walked in the door from his 6 hour a day job at that point, greated him with an ''i love you'' and a big smile, as i always did... had the table set, turned on his fav show...so he could watch it while he ate... and he snapped... it wasn't that did something wrong... i just happened to be the closest person to take it out on. so just be careful... stupid version of the long story, i believed him that it was a one time thing, but after that, it happened frequently, until i got my head out of my ass and kicked him out... and even if we'd bicker, when he didn't take it out on me physically... the rest of the house paid the price... but unlike most women that claim abuse.... i have the pictures of the marks he left on me.. and the last time, the wake up call, per say, the pictures and the police report... and no one believed me that Chad Goodwin, the charming, laid back, jokester could do such a thing... until that point. It's sometimes the ones you least expect, and sometimes when you least expect it.