Can I help my family deal with their grief over the death of my nephew?

My teenage nephew passed away six months ago. He was murdered at a party by someone who crashed it, someone who he had never met before. It was unexpected, and there are a lot of unanswered questions and a lot of anger towards the boy who did it. I think that my partner and I are grieving appropriately. We were devastated at first, and we are doing our best to support our family, and we are adapting to life without my him. I remember you saying in a recent episode that if your mother ever passed away it would be really difficult but that you would need train yourself to adapt to life without her. I've found that advice really helpful, and I think that my partner and I are doing a good job at it. However, my family is suddenly turning to religion as an answer, clinging onto every detail of the court case, and pushing people who love and care about them away. I know there is no cookie cutter way to grieve, but what support or suggestions can I offer my family?