Warrant #1 only states that prior to both phones being turned off, phone records indicated that they have called eachother 13 times. The 10news.com article uses the term “that day”. Warrant #1 doesn’t. I did a cursory of the remaining warrants but didn’t find info relating to those phone calls.
CNN “that Day”
http://www.cnn.com/2013/08/14/us/california-amber-alert-dimaggio/index.html
http://www.nydailynews.com/news/crime/abducted-teen-mom-brother-tortured-killings-article-1.1427247
The search warrant says Robinson had “multiple/unusually large volume of calls to DiMaggio’s phone on the day of the crime.” Investigators originally suspected Robinson was “possibly aiding DiMaggio in his capture by authorities.” Robinson has not been charged with any crime.
http://www.10news.com/news/search-warrants-reveal-details-in-kidnapping-murder-case-081413
Search warrant shows 13 calls between James DiMaggio, Hannah Anderson on day mom, boy died