Can a person charged with physical assault lie and possibly be found not quilty of the crime even if there is proof?

I returned my child to her father’s home after a doctor’s appointment. Words were exchanged & he pushed my down concrete steps on his property. His family called police while I sit there in pain & defenseless without my cell phone that day. I waited for the police to arrive but after 25 min. no show. . I informed my assaulter I would return. I drove three blocks to my family house asking to accompany me back to his property and to bring a cell phone to call 911. Instead I changed my mind & my family rode along with me to the local police department. Police seen my injuries and I had charges brought against my assaulter. The DA took picture & stmt, and then I then went to hospital. According our attorney’s my assaulter is denying the claim and states I fell on his property. Can he be found innocent? PFA in effect