The card was gone when they got it.
If you look, it is a microsd card, with no locking mechanism on the outside. It most likely flung out with much force when it hit the ground. When the quad crashed, it probably turned/tumbled a few time flinging the card out in an unknown direction. Have you ever tried to find a microsd card in your yard? (Good luck)
Then where did they get the telemetry data?