Dzhokhar Tsarnaev had been the subject of a massive manhunt since early Friday morning, when the 19-year-old and his 26-year-old brother were in a violent shootout with police. Tamerlan Tsarnaev was killed. Dzhokhar escaped until police found him Friday evening.
A woman who lives at a residence on Franklin Street in this Boston suburb called police after she noticed blood on the boat in her back yard and a shed door open, said a law enforcement source.
When the first Massachusetts state troopers arrived, they heard movement inside the boat and called for backup.
A swarm of police soon joined the scene, and gunfire was exchanged with the suspect, the source said.
A police helicopter with heat-imaging equipment saw that he was inside the boat and still moving but badly injured.
Tsarnaev, one of a pair of ethnic Chechen brothers who came to the United States a decade ago, had been in flight since a shootout with police in the early hours of Friday. His brother, Tamerlan, 26, was killed in the confrontation. (Continues)