Can we sue the gas station where my wife was carjacked?

She was pumping gas at broad daylight, she had the keys in her hand, and the thief came from behind and assaulted her and forced the keys from her hand, she struggled with him to keep him from taking the keys, but ultimately he won out. She fell to the ground, and he took off with the car. This led to a police chase into the next town, where he lost control of the car and crashed into some shrubs in front of a house. The undercarriage was destroyed and the car was a total loss. Luckily, our insurance will cover the loss. During her struggle, no one did anything to help, till after it was too late, and there were plenty of people around. Not even the employees of the gas station helped. I was considering filing a suit against the gas station, but wanted to know if we even have a case.