婴儿在托儿所死了,怎么办?

我的女儿11个月大,前天突然在托儿所死了.具体情况是这样:
My daughter Yi Yi Elizabeth died yesterday around noon time when she was sleeping in the car seat in the babysitter's house. When i went to pick her, the babysitter said she is sleeping for two hours, why you just leave your milk then come back later. I said it is OK, i will pick her she sleep in the carseat anyway. Because Yiyi is always very alart, she put her in the corner room upstair. When I lift the car seat. looks like she is still sleeping with her mouth opened. and when I put the carseat in my car. She still the same. I touch her face, is cold. Then I check her, no breath, Then I took her into the room. call 911. I tried some ER skill, no working, and ambulance came. They put me aside and do the cpr. I was told that she died anyhow 1 hours before I came.
请问我们需要寻求什么样的法律帮助. 万分感谢!