"The FBI hostage rescue team is the best in the world, and they proved it yesterday," said Fuentes, who was not involved in Monday's rescue.
A law enforcement source would neither confirm nor deny that a flash grenade was used.
What's next for Ethan?
While Ethan recuperated Tuesday from his ordeal, school officials began planning a party to celebrate the boy's birthday and to honor Poland, the bus driver hailed by school officials as a hero.
While the party won't be ready by Ethan's birthday, it will be held soon -- likely at the Dale County High School football stadium, Bynum said.
Ethan's elementary school principal, Phillip Parker, said teachers are eager to have him back and "wrap their arms around him."
"Everybody knows Ethan. He's a good kid, a friendly kid," Parker said.
Relief that Ethan was safe was palpable in Midland City, but many questions remain about what comes next for him.
How does a 5-year-old heal from this ordeal? How does a youngster go on after witnessing his bus driver shot to death, then being dragged to an underground bunker by a gun-toting stranger? How will he deal with what he experienced the six days he languished in that hole and what he saw during the explosive rescue Monday that killed his captor?
"It's very hard to tell how he's going to do," said Dr. Louis Krause, a psychiatrist at Chicago's Rush Medical Center. "On the one hand, he might get right back to his routine and do absolutely fine. But on the other hand, the anxieties, the trauma, what we call an acute stress disorder, even post-traumatic stress symptoms, can occur."
A psychologist said even if Ethan appears to be doing well on the outside, he needs to talk out what happened to him. Hoping the 5-year-old will forget what happened would be a bad strategy, said Wendy Walsh.
"That's not actually good because when you start to forget, some traumatic events they get stored in your body as feelings that crop up at strange times in your life," she said. "It is better to process it, get some therapy."
Someone who knows all too well what Ethan may go through is Katie Beers, who as a 10-year-old was held underground in a concrete bunker for two weeks by a New York man.
"I am ecstatic that Ethan has been retrieved safe and sound," said Beers, who recently released a book about her abduction. "As for my ordeal, I just keep thinking about the effects of it: being deprived sunlight, nutritious food and human contact. And how much I wanted to have a nutritious meal, see my family."
Beers says she still feels the effects of her kidnapping.
"The major issue that I have is control issues with my kids and finances," she said. "I don't like my kids being out of my sight for more than two seconds. And I think that that might get worse as they get older."