Later, he accused Bhutto of "ignoring" warnings from the government and detailed the security provided to the former prime minister in Liaquat Bagh, the Rawalpindi park where she was killed last week.
The chief reason Mr Cameron went to Amritsar was because of the large numbers of voters of Punjabi origin back in the UK. So he had to say something about Jallianwala Bagh, officials say.
The Associated Press of Pakistan said the detectives also watched videos of Bhutto's last moments three times, and looked at bird's eye view photographs of Liaqat Bagh park taken from a building that overlooks the Rawalpindi public site.