So the police now have DA's phone, HA's phone was also taken as were 2 more Iphones from their residence as well as an iPad. I would be very surprised if they had managed to completely delete all relevant texts, whatsapp data, photos, emails, documents etc. They have made mistake after mistake.
They can find deleted things. They showed Wendi a deleted text at one of the trials.
Years after lawyering up and with the full knowledge of how LE can access deleted data, it’s unfathomable to me that the devices were not professionally wiped clean.