Hou no Bannin wa Mamoru Sekai wo Erabenai

Elite prosecutor Nakamura Yuki attempts to prosecute the president of an IT company for a heinous traffic accident, but ends up being killed by the powers of darkness. When he comes to, he finds himself faced with a goddess who asks him to "bring order to her world with the power of law." Yuki accepts the proposal and is given the skills to be a guardian of the law, then reincarnates into another world. His first job is to defend the legendary dragon, who has been charged with "murder" after burning to death a party of heroes with his flame breath!

(Source: Morning Two, translated)