Brocci was just one of the incompetent bunch of "CSI" officers doing the crime scene forensics. They palpably did not know what they were doing. The handy video they shot (on a camera which incompetently showed the incorrect time.....) showed again and again that they were semi-trained at best, bumbling, ignorant of even the most basic forensic CSI safeguards, and led by someone (Stefanoni) who also had no idea of how to do the job properly.
It's a cast-iron guarantee that any competent, experienced CSI officer would be shocked, embarrassed and amused to watch the video of the antics of the white-suited buffoons in the cottage. Who can forget such zingers as "the infamous bathroom smear-and-blend swabbing technique", "the traipsing all over the entire floor area of the cottage with the same shoe covers (thus ensuring the improper redistribution of critical floor deposits) incompetence", the "pass the parcel of the bra clasp with visibly dirty gloves fiasco", or the it'd-be-hilarious-if-it-wasn't-so-shocking "wrapping the mop in the Christmas wrapping paper found in the cottage abomination".
These morons were way, way out of their depth. However, IMO most of the blame for this utter fiasco of CSI work should rest with the people responsible for training, and with the people responsible for assigning this team to such an important crime scene analysis. I wonder who those people could have been......