30 May: Seen getting into car outside nightclub on last night of her trip
31 May: Fails to show up for flight home
2 June: Natalee's family offers reward for information
4 June: Police say three young local men claim they dropped girl off at her hotel at about 2am on 30 May
5 June: Two security guards arrested in pre-dawn raid
6 June: Expanded search for Natalee begins with hundreds of volunteers
9 June: Police arrest the men who claimed they gave Natalee a ride
13 June: Security guards released
23 June: Local judge, Paul van der Sloot arrested. He is father of Joran van der Sloot, one of three men already in custody