Q: A brother got killed and the burial committee did not do washing on the body. How? Why?
A: If the person after being killed did not receive any medical aid, food or support directed towards survival, etc. then it can be said that he died as a martyr. In such a condition, upon the burial committees qualified evaluation with the approval of a qualified scholar, a decision to avoid a washing (ghusal) would be correct. He will also be buried in the clothing he died in.

Just so this does not become a fad, the deceased must also be a good Muslim.

Regular Janazah prayer would still occur.

Allah Certainly Knows Best.