Munchausen's by Proxy?

I'm wondering if anyone can direct me to a FACTUAL website regarding this syndrome, if anyone has had direct contact with a Munchausen's patient.

A 2.5 year old nephew who has been 100% healthy since birth, got an ear infection over 2 months ago and since then has had febrile seizures of increasing severity. The mom is a stay-at-home mom who has a history of "just deciding" not to give various meds for whatever reason. If Dad doesn't do it himself, it doesn't get done.

The situation in a nutshell is this: child goes to hospital, all tests (EEG, spinal, MRI, CT scan) normal. No epilepsy, but febrile seizures due to ear infection. Funny that the ear infection only responds to antibiotics given by a pediatrician wielding a needle. Funny also that the seizures only respond to meds given in hospital or by father. As soon as child goes on oral meds, and father goes back to work, infection returns, and seizures escalate. Child is now on so many meds he has no normal baseline between seizures which are short lived in duration, but occur average 3x an hour.

The mother has other "issues", but has already been documented with bizarre harmful behavior regarding this child abd another one a year older. Primarily overfeeding to the point they both vomited several times a day and were 99 percentile for weight. Three different pediatricians told her she was "actively harming" the children, and it wasn't until they got old enough to refuse food that they got down to normal weight.

Everyone involved (including father) is becoming increasingly suspicious of the mother, but how to prove she is the one either actively harming the child, or actively neglecting treatment or "augmenting"?