If my friend had sent them the money! Where to go for help?

Hello everybody! my friend had sent the money to scammer in London! Are there ways to get them back? If we will go to Interpol? or maybe something else? Thank you!

You can contact the police in the local region.

Sadly, if the money was sent by online transfer service there is not much hope of recovery. What happened is a crime, but recovery of the money is highly unlikely. It most likely has been spent.

This is a great chance to remind people reading here. Do NOT send money to anyone you do not know in person. Not someone you met by email. Someone you have met face to face. I really advise not to send money to anyone who isn't part of your family.

I'm sorry your friend has been fleeced. One thing you could try is phoning the money transfer comany and ask by whom the funds were collected. Depending on the operator, they may/ may not tell you but it's worth a try. As Bubbles indicated, contacting the local police is an idea. Remember to take emails, receipts, copies of the email headers etcetera with you.
Scammers use services like wu / moneygram because it's quick for them and transfers are not really traceable. Once the funds are collected, there is no recourse and recovering money is highly unlikely.
Wire transfers are convenient but regretably scammers use it for all the wrong reasons.