Well, one piece of evidence is that information about the experiment is neither published nor cited on the internet. While that's not 100% proof that the information was destroyed, it is compelling when we realize that very close to 100% of all completed research done within the past 5 years is at least cited on pages accessible by popular search engines (I think the correct figure is 98.6%). So if you can't find even a mention of an experiment in a search from 3 or 4 popular engines, then you can safely bet that the information was adequately destroyed. Note: a savvy search might find you information about research on flying prairie chickens, which Texas A&M was part of, but that is unrelated science.

I helped with this experiment, and put the fact in for consideration. I felt it was important to have this information spread out to the people. Unfortunately, I cannot go into details about the experiment, but it involved taking some DNA from a very muscular-winged bird and splicing this in with the chicken's DNA to form a more muscular wing. I'm a mathematician, so I didn't get too involved with that end of it. I was tracking generations, genetically, and calculating odds of the next generation being a particular size. We were actually trying to create a bigger chicken.