nick's bedroom. that's where she found blood on broken panes of glass and on the stucco. the killer cut him or herself coming in through that window? >> yes. >> reporter: there was blood throughout nick's bedroom, in his closet, and on a mouthwash cap in his bathroom. >> the floor was very sticky, and it smelled very heavily of mouthwash. so we felt at the time that whoever did this tried to clean up whatever tracks they left. >> reporter: in the bedroom, more evidence the killer tried to clean up. >> it appeared that the rug under the bed was cut. like half of the rug was gone. >> reporter: detective garcia believed the killer bled so heavily on the rug that he or she cut the rug and took it right out of nick's house. there was also evidence the killer failed to get rid of. garcia's team recovered 11 shell casings, each with a unique five-star stamp. and this was odd. 11 shots, yet none of the neighbors called 911. >> very early on, the detectives that i was working with, who have done previous homicides, they believe that a silencer was used. >> reporter: one neighbor s