The most famous incident, witnessed by many and widely-reported at the time, was Dre's beating of Dee Barnes in 1991. For those who don't know the details of the incident, watch this first-hand account.
Also, from a Rolling Stone article in 1991:
More recently, Ruthless Records singer Michel'le, who dated Dr. Dre in the '90s, also claimed abuse:
There is zero known history of Dre ever physically assaulting a man.
Maybe Dre has reformed since those days, and has made amends with Dee Barnes and Michel'le. Who knows? No one has brought the topic up to him, Eminem reference aside. Getting an interview with Dre is so rare and restricted that journalists don't want to screw up their opportunity.
However, now that Dr. Dre is a key player for an international corporation, his past should not be ignored. It's unlikely that Dre is going to be any more open to interviews, but journalists can certainly ask Apple representatives how they can hire someone with a history of beating women.
EDIT: I've come around a bit on this issue after reading some of the points people have made here. Dre hasn't had any woman-beating incidents since the '90s, and it's probably safe to say he's left that behavior behind. I still don't think woman-beating can be chalked up to youthful indiscretions, but Dre did grow up in a really rough area. As for Dee Barnes and Michel'le, only they can say whether Dre finally did right by them.
Also, from a Rolling Stone article in 1991:
Last November the Fox TV rap video show Pump It Up ran a segment on N.W.A. in which it crosscut between members of the group dissing their former partner Ice Cube and a previous interview with Cube in which he bad-mouthed them. The members of N.W.A. decided that the clip made them look bad. On January 27th, Dre ran into Pump It Up host Dee Barnes at a record-release party in L.A.
According to a statement issued by Barnes, Dre picked her up and "began slamming her face and the right side of her body repeatedly against a wall near the stairway" as his bodyguard held off the crowd. After Dre tried to throw her down the stairs and failed, he began kicking her in the ribs and hands. She escaped and ran into the women's restroom. Dre followed her and "grabbed her from behind by the hair and proceeded to punch her in the back of the head." Finally, Dre and his bodyguard ran from the building.
Far from denying the attack, the members of N.W.A. insist that, as Ren says, "she deserved it bitch deserved it." Eazy agrees: "Yeah, bitch had it coming."
"Coming like a motherfucker," Ren continues, "she shouldn't have done that." Barnes says that she was against running the piece in the first place, but Ren disagrees. "She's lying," he says. "She had something to do with it. She sure was in that scene with [Ice Cube]."
And Dre himself says: "People talk all this shit, but you know, somebody fucks with me, I'm gonna fuck with them. I just did it, you know. Ain't nothing you can do now by talking about it. Besides, it ain't no big thing I just threw her through a door."
Barnes, who first filed charges against Dre in February, is now pursuing a civil lawsuit alleging assault and battery, infliction of emotional distress and defamation. "Their whole philosophy has been that they're just telling stories, just reporting how it is on the streets," says Barnes. "But they've started believing this whole fantasy, getting caught up in their press, and they think they're invincible. They think they're living their songs."
Barnes says that she has continued to receive threats from associates of the band and that it took her this long to go public because "it really messed me up." "Dre was like a big brother to me," she says. "I still get very emotional about it." (Newsweek provided an alternative explanation for the delay, reporting that Barnes originally offered to drop the charges if Dre would help her own rap group with its music.) Says Barnes: "Now it's bigger than just me one individual getting slapped around. It's a campaign of them with a Number One album calling for violence against women. They've grown up with the mentality that it's okay to hit women, especially black women. Now there's a lot of kids listening and thinking it's okay to hit women who get out of line."
More recently, Ruthless Records singer Michel'le, who dated Dr. Dre in the '90s, also claimed abuse:
Michelle: One of my boyfriends hit me and crooked it, so I had to try and straighten it and it took years because it cost a lot of money.
Wendy: One of your babys fathers broke your nose?
Absolutely.
And you stayed?
I stayed because my father had never told me he loved me until just the last three years, so I think I had to go back and figure that out. Its in my book but getting beat was love to me. Believe it or not when I got with Suge he really didnt beat me. I asked him, Why arent you beating me? You dont like me? I asked him that.
Well if it isnt Suge, then the fingers are pointing at you Dr. Dre.
He knows it. It was very public. It was very, very public so that wasnt a secret. I did five videos and we had to cover three black eyes. It seemed like the day before a video, I would get a black eye and we had to cover it. I truly, truly, truly loved him, but it was okay and I truly thought he loved me. I didnt take it as anything bad, nor did I grow up seeing it in my household.
There is zero known history of Dre ever physically assaulting a man.
Maybe Dre has reformed since those days, and has made amends with Dee Barnes and Michel'le. Who knows? No one has brought the topic up to him, Eminem reference aside. Getting an interview with Dre is so rare and restricted that journalists don't want to screw up their opportunity.
However, now that Dr. Dre is a key player for an international corporation, his past should not be ignored. It's unlikely that Dre is going to be any more open to interviews, but journalists can certainly ask Apple representatives how they can hire someone with a history of beating women.
EDIT: I've come around a bit on this issue after reading some of the points people have made here. Dre hasn't had any woman-beating incidents since the '90s, and it's probably safe to say he's left that behavior behind. I still don't think woman-beating can be chalked up to youthful indiscretions, but Dre did grow up in a really rough area. As for Dee Barnes and Michel'le, only they can say whether Dre finally did right by them.