Agent Ryan was truly experienced, and on his way back, Jimmy was still pondering over Ryan's investigation route and some details. The FBI really had an abundance of capable individuals. If Jimmy had to investigate the scene, aside from his special abilities, he probably couldn't have been as thorough as Agent Ryan—no, not probably, he definitely couldn't have been. Scene investigation really requires experience.
Peter, who had mentored Jimmy previously, mainly employed his familiarity with artworks and his close connections with museums and collectors, which enabled him to conveniently gather information and narrow down the range of suspects. By analyzing the crime scene, he could trace the suspects' modus operandi, then track and intercept their next move.
