This is the tiny, waterlogged culvert where fugitive 'assassin' Vance Luther Boelter hid after he was spotted traipsing across sodden marshland by a stunned neighbor, DailyMail.com can reveal.

Boelter, 57, ducked down and slid into the tiny pipe after Wendy Thomas saw him crossing a field a mile from his home in Green Isle, Minnesota.

But quick-thinking Wendy flagged down a passing cop car and moments later the accused gunman was surrounded and taken into custody.

Boelter – facing multiple stalking and murder charges – was captured Sunday evening after the biggest manhunt in the history of Minnesota.

The accused killer dressed as a cop and donned a terrifying latex mask to shoot Minnesota State Senator John Hoffman and his wife Yvette on the doorstep of their suburban Minneapolis home in the early hours of Saturday.