I've be thinking if it is possible to know wich songs were playing in the musicmatch app at that night. If it was recorded on the computer data, maybe it can be match to some pattern of what Josh was listening on that week or if it corresponds to Josh musical taste. Also, maybe knowing wich songs was being listened can give a hint on how was the mood of the person who was at the computer.

By the way, is it possible to all of his computer data, or at least some, to be public released?