Suspect Sergei Tsarnaev hides in a covered boat in a nearby backyard . Boat owner David Smith finds a section of loose tarp . `` It was absolutely horrifying for approximately 40 minutes , '' Duffy said . One of the ropes has been cut . Henneberry sees a pool of blood in the boat and calls 911 .
Suspect Sergei Tsarnaev hides in a covered boat in a nearby backyard . Boat owner David Smith finds a section of loose tarp . One of the ropes has been cut . Henneberry sees a pool of blood in the boat and calls 911 .