Interesting... That suggests that real time broadcast of contrary sounding orders on publicly accessible police radio channels might have been used to obfuscate what was really going on. Or maybe multiple teams were involved, and somebody decided who got to take credit. So they chose the transit police, for some reason, perhaps related to jurisdiction.
"“When the time came to move in on him, the FBI agent was there and he said ‘okay, you guys are going to take the lead,’” MBTA Sgt. Sean Reynolds said.
“When we first started moving up to the boat, he was laying on the side of the boat. He was in and out of consciousness. When we got to 10 or 15 yards from him, he sat back up.”
The FBI had negotiated his surrender..."
Once the FBI HRT guys had negotiated the surrender of an unarmed, semi-concious guy, they handed it over to the MBTA SWAT team to handcuff him.