bloodstained

• blood-stained

From blood +‎ stained.

• (General American) IPA^(key): /ˈblʌdˌsteɪnd/

bloodstained (comparative more bloodstained, superlative most bloodstained)

1. Stained, spotted or otherwise discolored with blood.
2. Having the color of something which has been stained with blood.
3. Responsible for the deaths of others; guilty of murder.
   • 2010, Peter Hitchens, The Cameron Delusion, Bloomsbury Publishing, →ISBN:

     This self-delusion is even more the case with Trotsky, whose bloodstained intolerance is generally passed over because the 1960s student generation pretended then, and pretends still, that Trotsky was in some way a freedom-loving, Gulag-free alternative to Stalin.

4. (by extension) Guilty of wrongdoing.

• bloodsoaked