@Override
  protected Fragment createFragment() {
    // return new CrimeFragment(); Calling the CrimeFragment constructor directly

    // Retrieve the UUID from CrimeFragment
    UUID crimeId = (UUID) getIntent().getSerializableExtra(CrimeFragment.EXTRA_CRIME_ID);

    return CrimeFragment.newInstance(crimeId);

    // Activities need to know about their fragments, not vice versa
  }
  @Override
  public void onCrimeSelected(Crime crime) {
    if (findViewById(R.id.detail_fragment_container) == null) {
      Intent pagerIntent = CrimePagerActivity.newIntent(CrimeListActivity.this, crime.getId());
      startActivity(pagerIntent);
    } else {
      Fragment newDetail = CrimeFragment.newInstance(crime.getId());

      getSupportFragmentManager()
          .beginTransaction()
          .replace(R.id.detail_fragment_container, newDetail)
          .commit();
    }
  }