The death would absolutely be relevant in a criminal case (e.g., under the applicable federal statute matching the described conspiracy against protected conduct, it changes the maximum penalty from ten years to death or life in prison), in a civil case, it may also be relevant, as it would likely be among the harms forming the basis for damages. (It may even be the basis of the tort, e.g., if pursued as wrongful death, where the part you describe is the “wrongful” part.)