Roll On

I have a year and half year old boxer pit female, my mother and roomate and I have had for since she was a small puppy, she is a dog I feel I have a great relationship with.

Well anytime I raise a stick, pole or rod like object she cowers down and looks terrified, I have never picked up anything like that and hit her, neither has my mother, and our roomate we don’t get along with seems to love her as well, and he even claims he is a "search and rescue dog trainer" he boldly says this whenever he meets one of my mother or my friends, although he is nearly 60 and still an assistant manager at an autoparts store, he only helped train a guy’s dog like 10 years ago who happened to be a cop, but entitles himself as such.
He also has social issues and no family or friends and is really angry and explosive, his birthday was on Friday and he took the day off nobody called him, he doesn’t have a cell, and I can hear if the phone rang, no one stopped by, and I’m the one who gets the mail and no cards for him this whole weekend either, my mom and I were at home sick and he just stayed in his room the whole day and going to the kitchen and back to his room, slamming his room door each trip, he does the same thing for thanksgiving, christmas and about any day he has off, we invite him to our family’s holidays and he just pouts and is just a grumpy sad old man.

Sorry this is taking long but I suspect he has hit our dog with a stick or pole, because he is explosive and will yell if the coffee heater is on, or if the ice tray isn’t filled back up, or even as far as putting the lint liner on my bed if I didn’t swipe it off, it’s amazing that he has this desire to bother people, he got offended to because I didn’t introduce my now ex girlfriend to him, it’s like "Well no, because I absolutley love this girl, and you are such a negative influence and I’m having a good night with her" well about the hitting, I first noticed this about a month ago, when I was assembling a mounted shower caddie, and my dog was being rowdy in the house and I jokingly raised the long pole and she ran like 4 steps away and went very very low to the ground without actually laying down and her face looked very terrified and it disturbed me a lot, I told my mother about this and she said she would talk to our roomate about this is in a passive approach although she has never told me if she did or not, well I forgot about all that until today when I was wrapping a gift today and we let our dog in the house alot, well she was being hyper running around the house, barking at the ghost in our house, and just being playful, and I did my best King Leonidas impression and raised the wrapping paper roll in a downward slash motion without actually swinging and my dog again cowered and seemed scared.
So now I know he is the only suspect because he has her in his room a lot with the door closed because he always slams it and we have people over but she gets to excited we usually keep her outside because she always jumps on my best friend and licks his face and my dog also tried humping my ex-girlfriends leg before I pulled her off, but each time there’s a guest she rushes to them I am aggressive to get her off but I’ve never hit her. Unless someone jumped our fence and beat our dog with a pole when I was at school and they were working, the only contact she has with other people is always with my own, my mothers or our roomates supervision unless we go on vacation and our house sitter has beat our dog, but this I doubt because the only instructions were simple and he worked during the day, well the question is what can I actually do to take action about this, directly confront him only for him to deny it, I really don’t know but please give me some opinions and options
Thanks

It’s a hard call. You could talk to someone at the ASPCA, anti cruelty society or humane society for advice as they have had more experience with this type of incident. Please try & keep your pet away from your roommate. Having an explosive temper is not a good sign. Sounds like he may even need psychiatric help.