From the first 911 call, moments after Minnesota state Sen. John Hoffman and his wife, Yvette, were shot at their home in the early morning of June 14, police knew a masked gunman was impersonating an officer, had targeted a politician and was on the move.

Yet it would take 10 hours for law enforcement to systematically alert lawmakers to the exact nature of the danger they faced. Communication across a patchwork of agencies was also spotty, leaving some officials unaware of the threat for hours and raising questions about whether the suspect, Vance Boelter, could have been caught earlier.