Affiliate Marketing Secrets

Hello,
This is theoretically speaking:
I want to report someone I know and is “close” with. One of my former best friend I’ve known for 10 years has recently started selling large quantities of drugs. I personally hate him, and he also hates me. But in front of each other, we pretend we are good friends. I have a grudge against him because he back stabbed me many times with personal attacks and overall a bad history since i’ve known him. Although I never once betrayed him back or done anything bad in return for his personal attacks. I think its time for him to pay up, so I want to turn him to the police.
Although he is in his early 20s, he has family connections to cheap drugs(he has older dealers in his family) and has been selling large quantities to a big network of younger dealers. He is starting to make a large amount of money.
I know information about him, that only his “friends” would (including certain locations, location of his drugs, his family members that sell/manufacture), but if i report it to the police through an anonymous online tip. Will my tip be shown in court?
He will instantly know it is me who reported the tip, and he may harm my family members. He has siblings affiliated to gangs and FOR CERTAIN will get revenge. He knows where some of my family member works and I do not want to put them at risk.
Is there a way where I can report him without giving out too much detail? Can I just give the police his name, and his family members names that sell/manufacture drugs? What information can I give the police without jeopardizing my identity in court?
Furthermore, he has friends that are in the police and they know what he is doing, but they don’t bother to investigate him. If I submit a tip will the police that drinks and smoke weed with him give him my identity?
Please no answers flaming me for being a narc or a “snitch”.
I have my reasons and will make him pay up.