The Truth! so What If You Know!

A volunteer rescuer realized the impermanence of life during a rescue operation in a serious wildfire, which changed the entire trajectory of his life. Unexpectedly, many years later, after this wildfire caused many casualties, it was discovered that the lucky person was actually the arsonist, and the incident would haunt him for the rest of his life. With no one responsible, no one punished, and no department following up, So what if you know the truth?