Murder + robbery = life (maybe).
Murder + rape = 35 years
Crime of passion murder = 6 - 20 years.
From what I've been reading, the Peru authorities are backing off on the Stephany Flores looking at Van Der Sloots computer angle, in the sense that they are not confirming that, only that he confessed, in the presence of an attorney.
I get the feeling as well there will be stories appearing of online accesses to Stephany Flores bank account, etc. I thought I read that the father said her account was accessed during the time frame, but I can't find it again to provide a link, sorry.
Obviously there are more details to come out. I’m sure that there is much that we don’t know about. At this point it’s only a “hypothetical” discussion here as we can’t know all the details... yet.
Oh... and thanks for the clarification on those crimes and sentences ... :-)