He said the child had been killed after he refused to accept “an offer” from the militants, but he did not elaborate.
Mr. Boyle said his wife had been raped by a guard with the assistance of the guard’s superiors. He demanded justice for his family. His wife did not appear or address the reporters.
The couple were abducted in 2012 while backpacking. Ms. Coleman, who is from Pennsylvania, gave birth to all three children in captivity. Mr. Boyle’s statement at the airport in Toronto was the first public revelation that there had been a fourth child.
In videos released last year by her captors, Ms. Coleman had pleaded for her life, describing her time as a hostage as “Kafkaesque” and saying she had been “defiled.”
On the plane to Canada, she sat in the aisle of the business-class cabin wearing a tan-color head scarf and nodded wordlessly to confirm her identity to a reporter onboard the flight, according to The Associated Press. Her two elder children sat next to her. Mr. Boyle sat with their youngest child in his lap.
State Department officials accompanied them on the plane.
President Trump has praised the Pakistanis for their role in freeing the family. “This is a positive moment for our country’s relationship with Pakistan,” he said on Thursday. “The Pakistani government’s cooperation is a sign that it is honoring America’s wishes for it to do more to provide security in the region.”
At some point on his journey, Mr. Boyle gave a handwritten statement to The A.P. expressing disagreement with American foreign policy.
“God has given me and my family unparalleled resilience and determination, and to allow that to stagnate, to pursue personal pleasure or comfort while there is still deliberate and organized injustice in the world would be a betrayal of all I believe, and tantamount to sacrilege,” he wrote.
He then nodded to one of the State Department officials and said, according to The A.P., “Their interests are not my interests.”