The Journey After Being Released from Prison

[No system, no rebirth, no cheats] Two years ago, I personally killed a pervert who wanted to molest my mother. Two years later, I entered the underworld because of this. My name is Liangchun, and I am an ordinary high school student. My life should be ordinary, but someone wants to destroy my ordinary life. That day when I returned to Canada, I found a gangster who wanted to molest my mother, so I killed him in a rage. But I was sent to prison for excessive defense, and was released after two years of good behavior. When I first arrived home, I found my mother lying in a pool of blood. If the murderer goes unpunished and the police refuse to answer, I will personally seek justice for my family and I will kill them again. My name is Liangchun, spring of spring, Liang of conscience.