Three theories were being formed:

1) Lindbergh presumed that the kidnappers were professional.

2) Because of the kidnappers' familiarity with the house, the location of the nursery, and the modest ransom request, Schwarzkopf thought that the gang was local and unprofessional.

3) Lieutenant Keaton, Schwarzkopf's principal detective, wanted to pursue the possibility that the kidnapping might have been, directly or indirectly, the work of domestic employees, since somehow the kidnappers had to have been informed that the family was not returning to the Morrow estate, as was their custom.

by Russell Aiuto