In this talk we discuss the possibility that IceCube high energy neutrino events can be understood by a power law spectrum produced by astrophysical sources as well as by the decay spectrum of long-lived particles. We study the possibility of distinguishing these scenarios with current IceCube data and in the future as more data is accumulated. In particular, we study the circumstances under which the data can be explained solely by decaying long-lived particles. We consider a particular model which realizes this scenario,