How do we protect our children?

I am a complete loss and as close as I can come to completely breaking down.  Little man and I have survived a huge dose of reality over the last year only to yet again be smacked in the face.  As most of you know his father and I are divorced.  While I was undergoing my Chemo his father was a wonderful support system for us. He would cook, clean, and take me to my appointments.  In June I was able to stop all medications and begin my recovery. In August I asked him to start staying at his own apartment so I could get on with my own life. Now understand I have so much respect for him giving so much in our time of need.  However we are divorced with no chance of rekindling the love that was once there.  Once back in his own apartment he would refuse to come over, visit, or even call Little man. As a few weeks wore on and my nerves wore thin,  I decided the only way to get through to him was to hit him where it hurt. I contacted the prosecutor to have our divorce degree enforced.  Specifically his support; due to me missing work because Little Man has been so sick.   Now this man swears he has no money to help support his son, but has hired a very pricey attorney.   Now he wants visitation.  I think this is great. I want my son to grow up with a healthy relationship with his father. However here is where I’m going to lose it.  On the day he was due to pick up his son I sent him and email explaining Little mans medications, diet restrictions, and other issues. I again stand beside his care at the pick up and go over each medication again. Now he is a literate man and can read instructions. Hell he could call the pharmacy and ask for explanations should he want: the numbers on the bottles!  At two o’clock Sunday Little Man calls feeling sick. I assume this is a plea to come home because he is bored and I tell him to lay down it’s only a couple ours till he was due home. Well when he got home I found out that his dad had not given him his medication at all during the weekend! He also had not followed the diet restrictions.  So I contacted my attorney who then contacted the courts for an emergency hearing on visitation….they schedule it two weeks out!  Now there is a scheduled visitation in between now and the hearing! I am being advised to send my son or be held in contempt!  How in the hell is that fair to this kid? It just took 12 days to get his system straightened back out and I have to send him back over there?   Now apparently CPS is involved because failure to give him his medication is a form of neglect.  But they will not do anything until I get letters from his doctors stating that he has to have the medications?!?!? Isn’t that what a prescription is? It clearly states DAILY DOSAGE INSTRUCTIONS and was written by the doctor.  And Here I stand with Little Man wanting to be at his dads and me wanting him to go but struggling with being found in contempt if I tell his father he cannot have him until the hearing simple because he will not give him his medications.  So I try to do the adult thing and talk to the father on the phone last night.  Why do I even try? I knew how this would end.  First he says he never got the email. I have a return read receipt on file from both him and his attorney. Then I remind him I told him at the car…he didn’t hear that.  He says Little Man wasn’t sure what the instructions were so he just didn’t give them and he somehow knew “I would make a big deal out of it”.  My son missed 13.5 days of school in the first grading period due to doctor’s appointments, emergency room visits, or test he had to have run. I pack his lunch every day. He watches what he eats. We know how he suffers with this situation.  How can I with a clear conscious send this child back into harm’s way?  How is it the courts nor CPS see that this is an issue?  How come his father is not being held responsible for neglecting him!  How can a father that has watched his child endure lifelong issues and made trips to Riley month after month just not give a damn?!    But let me try to protect him this weekend and keep him home so he gets his meds and you damn sure bet I’ll get a letter asking me to come into court and prove why I should not have contempt charges thrown against me.   Please tell me…..How do I protect my child when no one else will!?