"We still don't have confirmation that there was in fact an escort by the military, and whether or not a second escort was arranged," Del Sordo added.
At this point, search efforts have provided no concrete answers.
"It could be anybody's kid that's on spring break. It could be anybody traveling abroad for any reason. It's a scary, scary thought," Schiear told CNN.
Help from the Obama administration and the Mexican government would aid the search for Devert, his loved ones say.
"We are doing everything in our power to find him. We need help. We need answers. We need Harry back," Schiear said.