Detectives honed in on July 16, 2008 rather quickly into the investigation. I'm not sure how or why they did, but they asked me to conduct a timeline that showed the use of the computers for that day. The original timeline I conducted was through the functionality of EnCase. I set the program to look at July 16 and July 17, 2008 and provide an indicator of the computer's activity during those 48 hours. EnCase gathers the information for the timeline by the file system dates and times; created, accessed, modified and deleted. EnCase then shows which files were active during that time. What I didn't realize at that time (but I know now) is that this was not the best approach. My timeline showed large gaps of time where it seemed there was no activity at all on the HP home computer. Therefore, I reported those gaps in time to detectives. They were working off the presumption that large gaps of time away from the computer could possibly mean that was the time frame when something may have happened to Caylee. I looked very closely at July 16th again just as the trial was starting. I filtered all the files on the HP computer to show only the 24 hours for that day. I sorted every file first by creation time and then by accessed time. What I learned was that the temporary Internet files were being accessed and created during some of those large time gaps when I thought nothing was going on. What I didn't think about in 2008 was that the index.dat files are stored in a database (hence the file extension .dat - DUH!). The EnCase timeline function reported the MAC times for the database itself and not for the individual records it contains. So, while the user is accessing the Internet, the index.dat file is not being updated the whole time it is in use. What I discovered was an AIM Logger chat (not about Caylee), lots of MySpace activity and local files being created and accessed to the desktop\pictures\shotgirls folder during the times I thought there was nothing going on. This activity goes on all day, from just before 0800hrs with a break for lunch time for about an hour and a half. At 1330hrs or thereabouts, the activity picks up again, after everyone has gone to work. What that means is that someone is one the computer from 0756hrs until 1146 hrs on the 16th of July, 2008. George (Caseys father, Caylees grandfather) testified that Caylee and Casey left at about noon. The computer activity stops at 1146 hrs, right on time. George leaves for work; Cindy (mom) is already at work earlier that day. The same type of Internet and local file activity resumes after 1330 hrs, when everyone is supposed to be gone. The AIM logger chat was between two users who identified themselves in the chat by name; Casey and the other user. The MySpace appeared to be Caseys as did the shotgirls photos. Casey was dating a DJ at a local night club at this time and although she didnt work at the club, she promoted the local talent there and hired girls to work the bar serving shooters. So, it makes sense that she would be researching the clothing the girls should wear. There were many pictures in this folder, some of which were created/downloaded from MySpace that day that Caylee went missing. I was prepared to testify about this new information as soon as Mr. Baez announced in his opening statement at trial that the baby drowned in the family pool the morning of July 16, 2008. Well, the computer tells us a story that indicates either this traumatic event never happened or the computer user ignored the crisis completely.