A man was shot and killed, and another man was injured with ...

A man was shot and killed, and another man was injured with a firearm by a 28-year-old man in prison. The injured man received medical treatment. During interrogation, the perpetrator claimed the incident resulted from a dispute. However, the police suspect that the incident was revenge related to the victim's past. The police seized the firearm, five shell casings, and two bullets. The police are investigating how the perpetrator acquired the firearm. At least twelve police operative staff members were arrested for power abuse.