The Bad Crowd
If you noticed that your kid has been hanging out with a couple of kids who do not share your same interests, do not in any way try to forbid them from hanging out. This will only make things worse. They would probably choose to stay with them because the fact that you reprimanded them made their friends more appealing and that would make you the villain. They would no longer confide their problems with you when this happens. However, there is an exception to this. If you see your kid stealing or doing drugs already then you may have to break the bond. This may jolt him a little bit but it will benefit him in the long run. He will be able to understand this.
Before stepping into any conclusion, you have to get to know this kid first. You may find the kid not dangerous when you talk and observe. For example, your kid may want to hang out with athletes and adventurous people. When you observe them, you may notice that they are not as dangerous as you think they are. Try inviting your kid’s friends to your house and get to know them deeply.