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 .
Suspect Dzhokar Tsarnaev hides in a covered boat in a Watertown backyard . Boat owner David Henneberry notices a section of loose tarp . One of the bindings has been cut . Henneberry sees a pool of blood in the boat and calls 911 .