Two killers. One is killed by the Intended victim. Can the surviving killer be charged for partner's death?

If so, what is this charge called? He will no doubt be charged for attempted murder and possibly several other crimes against the intended crime victim. But, I vaguely remember hearing of cases. where a criminal can sometimes be held accountable for the death of his fellow partner, if that partner gets killed, while commiting the crime. What if the partner is killed by the police? Is the surviving partner accountable for his accomplice, who dies at the hands of the police?