Joshua Boyle was previously married to the sister of Omar Khadr, a Canadian man who spent 10 years at Guantanamo Bay after being captured in 2002 in a firefight at an al-Qaida compound in Afghanistan, but U.S. officials discount any link between that previous family tie and his capture. One called it a mere coincidence.
Two U.S. law enforcement officials described the investigation, speaking only on condition of anonymity because the probe was still underway.
The videos, each under two minutes long and featuring the couple seated in spare settings before cloth-draped backgrounds, contain no apparent clues that might help investigators identify captors or locale. The video files do contain time stamps from different dates last year but officials said those notations could be manipulated easily.
The officials also cautioned that while the videos established that the couple was captured, they did not qualify as proof of life since there was no mention of current events that could help establish the time of recordings.
Even as they hold out hope, the families fret for their children's safety and for a grandchild born into captivity in a foreign country. They don't know the child's name or even gender.
"We love them," said Coleman's mother, Lyn, "and they're needed here. And we need to get them back home."
Follow Eric Tucker on Twitter at http://www.twitter.com/etuckerAP