We have more details on the Panettiere arrest.

Law enforcement tells us Alan allegedly struck wife Lesley at least twice with fist -- a right cross to the left cheek, causing noticeable bruising. We're told both had definitely been drinking.

Alan told cops when they arrived, "I'm Alan. Yeah, I just got into an argument with my drunk wife." We're also told Alan "clearly" was under the influence. Among other things, his eyes were extremely bloodshot and his hair was a mess.

Lesley is the one who called the cops and when they came she asked them to arrest her hubby.

These allegations make it clear why Alan was arrested on felony spousal abuse.