T.L.
Mallory I disagree just because Dad is spanking the child does not mean he is abusing the child. In my book 20 years ago when children were spanked for a good reason they seemed to act out less. We had less issues with children misbehaving as well. There is a difference in spanking a child and beating a child/hitting a child. i.e Popping a child's butt for stealing candy from the candy store will make him think twice about doing it. For some kids time out just doesn't work.
In my opinion your son is acting out for attention, not because he is a bad child. I would just keep trying to talk to your son or find someone your son can talk to. Does he trust a teacher or friend parent or even a friend depending on how old he is.
I wish you the best as I know this is a difficult situation for you.
Hugs!