Here's how a link works, Professor. A person makes a claim, (for instance, it appears the DOJ under Holder didn't want the video of the robbery to be shown, I guess for fear it may degrade from the narrative that these fellas were targeted to be harrassed, simply based on their skin color. Or that it would lessen the victimization of Brown as some nice young black man, just minding his own business). And then that person
provides a link to support that claim. Otherwise is just some opinion, based on nothing but the say-so of the person making the claim
The link can be when the claim is made, or if asked to provide the source where you're forming your opinion, after the original claim is made. If you're not sure how to provide a link, anyone of us can take you thru it, fairly easily. It's no biggie, as I'm not very sharp around computers myself