After a massive investigation , a baby 's body , presumed to be that of Charles Lindbergh Jr. , was discovered the following May 12 , some four miles ( 6 km ) from the Lindberghs ' home , at the summit of a hill on the Hopewell-Mt .
The following May 12 , a baby 's body was found 4 miles ( 6.4 km ) from the Lindberghs ' home .