In the background summary for Thomas Gilman (Matthew Lillard), it lists his birthday as September 26, 1977 (42 years old). That would make him 41 years old.
When the task force follows the fugitive to Hartwick Township, New York there are New Jersey State Troopers assisting the FBI.
The killer is wanted for three murders, but he's actually responsible for four murders: at the start, three family members and the neighbour who went to knock on the door were killed when the building exploded.
When Maggie addresses the firefighter at Gilman's house, she does so by calling him "Captain." The actor is also listed as "FD Captain" in the end credits, but his helmet badge says "Chief."
In her press conference, Isobel Castille says that 486 of the 521 fugitives on the Most Wanted list have been captured, a success rate of 95%. It's actually about 93%.
At the scene of the house explosion, Jess LaCroix pronounces the word "bogeyman" with a "boo" at the beginning (like a ghost sound). That's how an Australian would say it--the actor who plays him is Australian--but Agent LaCroix is supposed to be American.