The murderer's syringe was found, but there were no traces of drugs on it, which suggests that the murderer was using the syringe to kill his victims. The murderer tortured the victims, and as time went on, he became even more cruel to them. The passengers have spotted someone blocking the bus's path for a few days now, but the person has vanished when the bus stops. It's possible that these two cases are related, but they're still possible that they are separate cases
The murderer's syringe was found, but there were no traces of drugs on it, which suggests that the murderer was using the syringe to kill his victims. The murderer tortured the victims, and as time went on, he became even more cruel to them. The passengers have spotted someone blocking the bus's path for a few days now, but the person has vanished when the bus stops. It's possible that these two cases are related, but they're still possible that they are separate cases