My sincere condolences for your unbelievable loss. Have they found who murdered your husband?
I hope you receive from medical therapy as you walk through your deep sorrow.
In time you will feel your husband's unseen presence/spirit, but don't think it will happen right away. As this happens, you will come to have the peace that passes all understanding. For now, keep crying as it is an important cathartic.
I'm glad you sought out this forum as there are a lot of good people on it.
All the best to you in the days to come.