How can you find out if someone you know is dealing drugs?

I think unless this person's dealings are having a direct effect on you I would stay out of it whether he is dealing or not. You could be treading on very dangerous ground here.

Ask him if he knows where you can get some Smurfs or Care Bears. Or tell him you're friends have asked you to go Rolling. If he's dealing he'll probably know that's street for Ecstasy & maybe you'll get somewhere after you see how he responds to the comment.

ask em for a dimebag and see what happens

Contact your local law enforcement office, and let them know of your suspicions, and if so, they will find out. Good luck!

If you are suspicous of a friend dealing drugs, simply watch activity, like kids coming and going, exchanging money etc. If you do think your friend is dealing, run and dont look back. Or just ask!!

Ask them.

If you are really a friend, why would they lie...

Unless you are planning on maybe 'helping' them, by ratting them out, and sending them to prison...

for me it depends what that selling. if it is coke, mdma, herion or anything in that way you´d better stop it because drugs are bad okay :) but marihuna and a lot of stuff is made illegal because eurhm.. yeah.. just find out

This person may work with people that work nights, such as celebrities, and thats why they are secretive.. they don't want everyone hounding them for autographs etc from their clients.
I know someone that does promo work with all the "big" name bands and celebrities that visit LA and he rarely tells anyone what he does, or who he sees and does business with. and he works late afternoons and late evenings.

Have you ever asked him why his business is so late at night? He may not tell you, but he may also lie, so guess you will just have to laugh with him... "Hey, you work for the mob?" haha

I Guess you would have to look at what they were doing, you need to look for certain things such as shifty behaviour, going out late at night, having large amounts of cash e.t.c if you do suspect they are you shouldnt confront them and you should tell someone e.g the police.

It really depends on what he/she is slinging.
I know alot of people that are dealing and all you really have to do is talk to one of their friends that you trust, or someone that doesnt know who you are that seems to hang around them alot. Just ask.
There are alot of ways to hide if you are dealing or not. You just need to hear it straight from some one's mouth who knows for sure.
If you ONLY want to find out, sometimes the police aren't the best to get involved. Simply because they are likely to make matters worse for that person. However, it is up to you. Good Luck<3

If they seem paranoid a lot, could mean their carrying the drugs. If they don't have a job and they have a cash flow, if they have many incoming calls, if they leave the house several times a day or if they have people comming to their place and going...drug deaing is a risky business because say you sell to someone for example an ounce of pot and as their leaving they get pulled over...cops will usually arrest that person and if not they'll make a deal "tell me who gav eit to you, where they live and how much more do they have?" thats how most dealers are busted...through the arrest of snitches