Ok, here's something I don't believe that has been brought up before. Are we absolutely, positively sure that Blaze and his friend went to this park, or is that the story that the friend is telling family and friends? Has there been any evidence at all that Blaze was actually in that park that night?
Thinking about this long and hard, so far, we're going by what the friend said. That he used the bathroom, came out, and supposedly, Blaze was gone. Something sounds a bit hinky about that. Are the bathrooms open 24 hours a day all year long? If it was a guy, as has been stated, how the heck long did he take to go to the restroom that he couldn't have caught up with Blaze in a matter of a minute or two?
Maybe the alibi was the park, but the coming back at 4 am has me unsettled now. What did they really come back for? To make sure all the evidence, if any was truly there, was gone? Or did this person want their own DNA there (hand print on door to restroom, paper towel in bathroom or water faucet, gum wrapper, etc) to try to back up their own claim that they were there to go with the story about Blaze going into the park?
Remember when they said a female friend got a text about an hour later, which led the parents to believe foul play might be involved? They also thought that Blaze might not have sent the text? Have they found his phone or anything at all in the park to prove he was indeed there?
Just my thoughts and opinions only.