Corrected entry: Season 3, Episode 12: "Gone" - Collette Bradley tells the Lightman Group that someone would need a spare key to get into her car and kidnap Kimberly. This implies that she locked the doors of her car. But if you watch the scene again, she doesn't lock the car. No action towards locking the car is taken and no sound is heard of an automatic locking system.
THGhost
10th Mar 2011
Correction: Collette told a lot of lies in conjunction with this one, so it doesn't stand to reason that this could be considered a plot hole. Everything she said was to try to avoid telling them that she left the baby unattended, and even then, was afraid to give the whole story.
Knever