it was made either in 2006/2007 i'm pretty sure.
the movie is about a bunch of people trying to pass some tests to become police officers or something along that line. it starts out with two of them are called to a fake crime scene to show how much they know. then they are sent to this island to figure out a murder. but in the movie people start getting murdered, i remember that one girl dies from smoking a cigt. that has acid on it. there was a a puppet in it as well i think it was a clown i dont know if any of this helps i just really want to know what it was. i really liked this movie but can't think of the name.

I know and love that movie! It is called "Mindhunters" and has LLCoolJ, Christian Slater and Val Kilmer in it right?

Yep. Mindhunters it is.