Why was the Lindbergh baby kidnapped?

Kidnapping is a crime that lends itself to faking. it Could have been an inside job by people in the employ of the Lindbergh household or even the family itself. Seems he had a big flying expedition ( with his wife) to the Orient in the planning stage, Junior got in the way... one wonders. Listen, this guy was a Bundist- a double Agent. a US Army officer who played both sides ( Us and Nazi Germany) If he wanted to, FDR could have easily brought him up on charges of disloyalty ( I think it is called article 88) -and is occasionaly employed against officers of the Armed forces that get too political on duty.