← All EvidenceCrossIan Whiffin - Cross Ian Whiffin Robert Alessi RedirectIan Whiffin - Redirect Ian Whiffin Hank Brennan
Digital Evidence
O'Keefe iPhone Battery Temperature Data
O'Keefe's overnight battery-temperature readings, presented through Whiffin's slides, showing cooling from about 82°F at 12:13 a.m. and warming when handled by responders around 6 a.m.
About
The prosecution argued the steady temperature decline proved O'Keefe's phone—and therefore O'Keefe—was exposed to cold outdoor conditions all night, consistent with being struck and left outside. The defense countered that the phone never dropped below 50°F over 4.5 hours, arguing this was inconsistent with true outdoor exposure and was instead evidence O'Keefe was in a warmer location.
Battery temperature readings from John O'Keefe's iPhone spanning the overnight hours of January 28–29, 2022. The data, presented primarily through Ian Whiffin's PowerPoint slide deck, shows the phone's temperature declining from approximately 82°F at 12:13 a.m. to lower temperatures over the following hours, with the phone warming when handled by first responders around 6 a.m.