Authorities said Thursday that Dykes was shot multiple times during the shootout with FBI agents and his body has been taken to a state lab for an autopsy.
The FBI said it was still at the bunker but hoped to be done soon so residents could get back to their homes.
"We came in as uninvited guests and the entire community has welcomed us like neighbors who have known each other for a long time. We will never be able to thank them enough," said Steve Richardson, head of the FBI's office in Mobile.
Officials hope to eventually throw an event to celebrate Ethan's birthday and recovery, but family members of the boy told AP they were not yet ready.
Associated Press writer Frank Eltman in Mineola, N.Y., contributed to this report.
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