This is what happened (taken from e-mail received by original poster):
Sunday, July 31st, around 3:30 pm, while driving home from an agility trial in Hutto, one of my Flyball Team mates, Mark Malone was in a dreadful automobile accident. He had his two German Shepherd Dogs with him, Steffi and Sasha. He rolled his SUV and the dogs were ejected. The SUV rolled over Sasha killing her and Steffi ran off. Mark was Care Flighted to Ennis.
His friends are trying to find Steffi for him. Steffi is a long haired, German Shepherd with a black saddle and brown feet female, spayed70 lbs 26" tall at the withers. She is a bit shy of people.
This happened on I-35 just south of Hillsboro near exit 373 or Exit 367 on I-35 Mark was heading north but someone saw a dog running from that exit 367 heading south.
Express permission is given to post this far and wide to any groups or anyone who can help us locate this dog. Anyone in the Waco, Hillsboro, Alvarado, and any other town and city between I-35 and Midlothian (where Mark is from) please please keep looking for Steffi.