Ok, I have had a dna test done on my daughter for the same reasons u did. My ex (a drug dealer, not nice) and my new b/friend a policeman, great ombo hey. There was also a small chance my ex could of been the dad but i agreed to a dna test as in my heart of heart i knew he wouldn't be. Anyhow, you CAN deny a test, only the mother has the right to sign to say you can have her childs dna. ALTHOUGH if he is on the birth certificate (which im guessing isn't or wont be) then he cant.
He will be able to take you to court over it although do u really think he would go to that length? Also he would have to pay, our court approved dna test cost £379.00 plus swab taking process at docs (£40 and afidavit form from solicitors £10.00).
We used a company called dna solutions
www.dnasolutions.com ......
I know it may not be nice if that 1% turns out to be 100% his but also your baby needs to know who his daddy is. Also if he is agressive and violent etc...and known by the police then you have a good fight in court for him not to see your baby or only while supervied.
I reccomend just making the police aware of his aggresive behaviour towards you just incase in the future it gets worse, at least they have a record of it then. Also you could get a restraining order against hi quite easily then he wont be able to contact you, thats what i did with my ex....and he left me alone.
Good luck and i hope everything sorts out for u xx