What probably needed to happen was whoever was in charge of that project should have recognized these two employees now didn't get along, and reassigned one or both of them away from the project.

as said higher it seems highly possible that she has no proof of anything - which means, if she's actually honest, she can't do much (except contacting a bunch of news sites and trying to make a big story out of it)

imagine this "i did all this work but someone deleted it! worked 2 weeks on it!" while in fact you were eating donuts ;-)

the problem is proof, when you have these allegations. if she has proof, then, she should sue them.