Not clear on the question. The code you listed appears to be the get method from the CrimeLab class which is a singleton. sCrimeLab is a private static field in CrimeLab and it holds the reference to the single instance of that class. The Context reference is passed into the CrimeLab constructor via the get method by the CrimeFragment, CrimeListFragment and CrimePagerActivity clients. The Context object is needed by CrimeLab for instantiating the JSON serializer.
CrimeLab is part of the “Model” layer in the MVC pattern. Clients call its get method to obtain a reference to the single instance of it. They mainly call it to get access to specific crime objects or the entire list of crimes so they can do things like add/save, display, update, and delete crimes, which is the classic CRUD paradyme that is encapsulated by the Model layer. As far as where CrimeLab is actually “stored”, well, electronically it’s stored in the Dalvik heap, but don’t think that’s what you’re asking. In terms of composition, an ArrayList of Crimes is contained in the client objects, which is returned by the CrimeLab singleton via its getCrimes method.