There are a lot things to look at, including a bunch that Rosa and Joey see differently, but only three items have information you really need.
The first is the laptop, which won't be too helpful until you get the password.
How do I get into Jamie's laptop?
Also note the name of the band on the poster. Epileptic Fish? Really? (So their music is cold-blooded, wet, and spasmodic?)
Finally, look at the whiteboard, which to Joey is just a string of numbers and letters, but to Rosa is a class schedule.
Rosa sees a class she took and even remembers the teacher's name: Elaine Appleton. Oogle that name to get a phone number.
Professor Appleton gives a lot of background on Jame, including the fact that she was hanging out in a nightclub called Munray's (Oogle it for the address) --
What am I doing in Munray's?
-- and that her death is being investigated by Detective Durkin. Maybe you can talk him into giving you more info; call him to arrange a meeting.
What should I say to Durkin?