Shaken baby syndrom

Please help us. Long story short, we adopted our son last April. We fostered him since he was 7 weeks old when we got the call that he was in the hospital with sbs. They didn't think he would make it. Since we adopted his older sister that's why they called us. Honestly, he is a miracle baby. He does have delays, ex: not walking and will be two in feb, didnt crawl till he was about 15 months old and he actually still doesn't crawl he hops like a frog. He's not had any seizures and had a shunt in until about 5 months ago. His sister does have some delays. My question is, have you had any experience with a child or heard of a child with a TBI caused by sbs having anger issues. He throws a fit and or cries about 85% of the day.