Van Der Sloot confessed to the murder of Ms. Flores, and then retracted his confession saying he was co-erced so we can't say that he's guilty. However, unlike with the Holloway disappearance (That he confessed to, and then retracted his confession...) his confession in the Flores case may stand.
Joran says that he killed Stephany after she got on his computer and invaded his personal space. Some venture to think that Flores could have seen something or found out something about the Holloway case which set him off.
Needless to say, Peruvian law is a lot different than the laws in Aruba. A judge has ruled that his confession stands, as there is no evidence of co-ercion or trickery involved in obtaining the confession.
Van Der Sloot is currently in a prison in Peru, and many doubt that he will even survive his stint in jail once he is convicted - if he is convicted.
Many are hoping that before anything happens to Van Der Sloot that more is found out about the Natalee Holloway case. She's been missing for five years now, and is presumed dead. For closure, it would be nice to find her body or find out more about what happened to her.