Looks like Law and Order: SVU cannot bring in a big name every week, so they're going to suffer when they don't. This was a solid episode, but I found it a bit confusing at times. It looked like they were focusing on a murder in the beginning and then quickly changed gears to revolve around a perverted older man "caring" for young teenagers and giving them their fix to replace their drug withdrawals.
Sometimes this show can be a bit hard to follow, but it will almost be guaranteed that you'll like every episode if you tune in. Why more people aren't watching this instead of Modern Family I have no idea.