Abraxas, perhaps if you read the articles, instead of just looked at the pictures in the articles, you would realize that the evidence is NOT the same for both sides.
Both sides have a picture of the receipt - this is true.
But, one side produced the original receipt for the news station. And, they produced a credit card statement. The other side said, "uh yeah, we have it, uh, we'll have to get back to you on that, can't show it to you."
Now, the restaurant NEVER named the family to anyone. So, lets look at motive. Faking the receipt - unlikely to get caught, 15 minutes of fame, and a reasonable expectation that with that fame was going to come donations from people.
The family: wanted to set the record straight after seeing this fraud take place. They were completely unknown until they came forward. At risk for them now is their reputation - it wasn't at risk before - because their side of the story is *easily* fact checked. Or, Abraxis, are you suggesting that the credit card company is involved in a conspiracy with this family to make the waitress look bad?
edit: oh wait, you're a broken record. "They faked the credit card statement." Here's why that's easily fact checked - if the reporter had any doubt whatsoever, "okay, here's my electronic statement from the credit card's website."
Now, that doesn't necessarily mean the waitress did it. Perhaps the manager wrote that on the receipt, and pocketed the tip himself; or a coworker. Nonetheless, there's no explanation that explains away her statement about considering spitting on their food. Sometimes when people lie, they tend to make up too many details - and that's what leads to the unraveling of their lie.