God Bliss, you really need to step back from the right wing echo machine and just stop and THINK.
Adam Lanza had a severe mental illness. He didn't have a job. He didn't go to school. He didn't pay taxes. He didn't have a driver's license(I don't think).
He was at home most of the day taken care of by his mother.
Why would he have a 'record' of anything readily accessible outside of his place of residence???
That's not a conspiracy. That's the typical lifestyle of a reclusive mentally ill young man.
As for his computer being destroyed at his home, authorities were still able to trace his whereabouts on the internet because they pinged his home's IP address. He was online playing first person shooter gaming sites all the time.
The youtube clip you just posted is only curious for a person who thinks there's a conspiracy afoot.
Adam Lanza was shot dead inside Sandy Hook ES. Why do you need to see footage of him entering the school??
Do you think his body was planted there by entities unknown??
You may not be using the words 'Sandy Hook" and 'black ops', but you definitely are making the arguments spewed by the right wing tin foil hat crowd.
You wanna timeline??
Here's one; Adam Lanza woke up, stole his mother's AR15 and assorted firearms, shot his mother dead, then drove to Sandy Hook ES and murdered 26 little kids and teachers before being shot dead by authorities.