There are so many ppl like the Zoe character.... wanting so much to do their duty and use their zeal to help catch murderers. Unfortunately, without the experience and education needed to really do the job, its surprising more ppl dont end up in the same situation.
the episode does a good job of showing rossi's feelings. he goes from confindent and a bit conceded to feeling real sorrow and guilt. he uses those feelings to help him do his job. it also shows how standard ideas of how serial killers work arent always typical. while the BAUs standard profiling techniques work the vast majority of the time, there are cases where those standards are used but out-of-the-box thinking is needed to realize there is a serial killer as well as trying to find him.
the episode does a good job of showing rossi's feelings. he goes from confindent and a bit conceded to feeling real sorrow and guilt. he uses those feelings to help him do his job. it also shows how standard ideas of how serial killers work arent always typical. while the BAUs standard profiling techniques work the vast majority of the time, there are cases where those standards are used but out-of-the-box thinking is needed to realize there is a serial killer as well as trying to find him.