It's the premise that makes this film garbage.
No, the FBI is not going to set-up a "profiling test" on an island with a made up killer. Why? Well, money for one. They're not going to have a budget to set-up an elaborate role playing experience for these people...complete with a forensics lab?? Ridiculous.
No, the FBI has interviewed killers, logged the facts of hundreds of cases...so many that these profiler "students" would simply be given the facts of a particular case, be asked to come up with a profile, and since the FBI knows who committed the acts, could check their accuracy against the killer's profile. All this could be done in a nice air-conditioned office. Why would they make-up a killer (the puppeteer) of which they have no facts when they could use real cases, in controlled exams? A la South Park: Dumb, dumb, dumb, dumb, dumb.
Everything else is horrible too: Hacker boy (Does anyone remember that movie?) Jolie's ex had the worst accent pretty much ever, DNA tests coming back in an hour, the character motivations...oh my god, the writer is such a hack in this regard. The elaborate set-ups that would take hours to put together...where did the killer find the time? Why is everyone so willing to believe one of their own could preform such a feat within hours? How would the supposed killer find the time? Answer: they wouldn't.
Pretty much lame, cliched, predictable garbage from the get-go.