Complex sentence: Police Commissioner Gerold Dompig, who headed the investigation from mid- 2005 until 2006, stated that the Mountain Brook students engaged in wild partying, a lot of drinking, lots of room switching every night.
Split into simpler sentences: Police Commissioner Gerold Dompig headed the investigation from mid- 2005 until 2006. He described the behavior of the Mountain Brook students, stating that there was wild partying, a lot of drinking, lots of room switching every night.