An investigation revealed that he'd died of a stroke the day after the riot, and that his death could not be directly connected to the Capitol riot.
[0] https://www.msn.com/en-us/news/world/brian-sicknick-police-o...
[1] https://www.cnn.com/2021/04/19/politics/brian-sicknick-death...
"Neutral" NPR reporting on this:
https://www.npr.org/2021/02/02/963336791/brian-sicknick-capi...
https://securitystudies.org/report-shows-babbitt-not-a-deadl...
https://www.justice.gov/usao-dc/pr/department-justice-closes...
Incorrect. The report does not conclude that. A political advocacy site dedicated to “defending the value of American power against the true threats we face” concludes that “based on” the report, which is, very much, not the same thing.