Javaris Crittenton -- ex-NBA star and accused murderer -- is now being accused of slapping his baby mama in the face while she was breastfeeding their 1-day-old child ... TMZ has learned.
Crittenton has temporarily been ordered to stay at least 100 yards away from Tyress Daniels and their newborn son ... after she filed court docs outlining a pattern of domestic violence.
In the docs, filed in L.A. County Superior Court, Daniels claims JC attacked her on three separate occasions. The first incident allegedly took place when she was pregnant and he roughed her up in a hotel room.
According to Daniels, the 2nd incident occurred at a hospital on Nov. 1 -- less than 24 hours after she gave birth to their son.
Daniels claims, "I was breastfeeding the baby and we got into an argument over what the baby would wear for pictures. Javaris hit me in the face while I was breastfeeding because he said I had a smart mouth."
Daniels claims Javaris tried to grab the baby and leave ... but hospital security rushed in and stopped him. He was eventually kicked out of the room.
According to the docs, Daniels claims JC got rough with her a 3rd time on Nov. 26 ... scratching her face and busting her lip. She also claims Javaris later sent her a text message saying she would end up like her "dead mother" and he will have the child.
After Daniels filed the docs, a judge awarded temporary custody of the kid to Daniels -- and set a hearing for next month ... when the judge will decide if the restraining order will become more permanent.
It's another major legal fight for the 24-year-old former Washington Wizards player ... who's facing a murder charge for the shooting death of a 22-year-old woman in 2011. Javaris has denied any wrongdoing in the murder case.