Corrected entry: When H.I. and Ed find out about the Arizona quintuplets, the babies are newborns. But when they go to steal one of the babies they are toddlers. So either H.I. and Ed waited a long time before they set their plan in motion, or those babies aged very fast.
jbrbbt
23rd Jun 2013
Correction: It's not like they heard about the babies, decided to kidnap one, and H.I. planned the kidnapping overnight. These things take time, so it's highly likely that your first supposition, that they waited a long time, is correct.
rswarrior