Today there was an active shooter at Brown university. So far reports are 2 deaths 20 or more were shot several may not survive. One of the many issues they had, was the President of the United States posting on Truth Social that they had the shooter in custody and it was over when in fact they did NOT have the shooter in custody at the time!
They do now, but when Trump said they did, it was still an active investigation, they didn't have the shooter, and Trump effectively told people it was safe to go out when it wasn't, which interfered with their investigation.