Greetings Katdan :-)
When I read your request I thought of the testimony of Nicky Cruz
[url=https://www.sermonindex.net/modules/mydownloads/visit.php?lid=4411]Nicky Cruz Testimony[/url]
This is the description for the message:
[i]This is one of the most powerful testimonies of our modern age. Nicky Cruz, a hardened violent street kid in New York City and leader of the dreaded Mau Mau gang, encounters Jesus Christ and experiences a radical change in his once dark and hopeless life. This is his story, his progression from unloved child to being alone on the streets of NY, to gang leader and then meeting David Wilkerson, and finally, being apprehended by the Lord Jesus Christ who wrought a powerful and amazing conversion in his heart. A must hear! [/i]
Also, you may find something helpfull from the testimony and ministry of Jackie Pullinger.
You can find the testimony here
[url=https://www.sermonindex.net/modules/mydownloads/viewcat.php?cid=117]Jackie Pullinger[/url]
Although the testimony is in 11 parts, it's not too long together and I think it's worth listening through. From what I remember, she ministered in Hong Kong, in a place called [i] the walled city[/i] which by her descriptions of it was not a very nice place. She talks about the ministry there to the drug addicted, prostitutes and gang members.
I hope these will be helpfull and I pray that God will be honored by these things.
[b] Oh that men would praise the Lord for his goodness, and for his wonderful works to the children of men![/b]