Complex sentence: At around 3 pm police requested the flatmates and their friends to attend the police station for further enquiries, in the car Knox sobbed when she overheard that Kercher's throat had been cut.
Split into simpler sentences: At around 3 pm police requested the flatmates and their friends to attend the police station for further enquiries. In the car Knox sobbed when she overheard that Kercher's throat had been cut.