'Innocent' in the Bible

Then the king said to him, "Do as he spoke; fall upon him and bury him, and so you shall remove the innocent blood that Joab shed from on me and from on the house of my father.

then you shall hear in heaven and you shall act and you shall judge your servant, to declare the wicked guilty by bringing his way upon his head and {to declare the righteous innocent} by rewarding him according to his righteousness.