Why is so scared the owner of the truck?  

Yeah, that was really strange, especially when we saw the house with the door open. I wonder why.

Well, the truck owner's acting and body language clearly implied (to me, at least) that he was afraid that someone could arrive or even just pass by and see him talking with a cop - so I assumed he was either scared of Richard Horne or some of his associates or both.

When he is late at the appointment with Andy and the camera I made the same assumption: either someone went in and attacked/killed the guy or, anyway, something bad happened (the shot is clearly edited to be ominous). 

As far as I am concerned, it's pretty clear cut visual storytelling: "guy is afraid something bad may happen --> something bad happens". 

Absolutely agree.

I'm pretty sure that there is something about the "whole story" that we don't know yet.

EDIT: In my previous post, I missed a whole part of a sentence. For some reason, I can't edit the old post. It should've been:

When he is late at the appointment with Andy and the camera LINGERS ON THE OPEN DOOR I made the same assumption: 

Yeah it has to do with Richard or Red at least..

The truck looked like the same truck Richard Horne was driving when he killed the young boy.  That's what I believe Andy was questioning him about.  "Who was driving that vehicle?"  As to why the man was afraid?  I believe it probably has something to do with Richard Horne and Red.  I'd probably be afraid of those two sociopaths as well.

Also, does anyone else think that the house in that scene looks similar to Dead Dog Farm?

Posted by: dude

The truck looked like the same truck Richard Horne was driving when he killed the young boy.

It was the same truck; that lady who is a huge fan of the RR Diner (or any of the other dozens of onlookers) probably caught the license plate of the truck as it passed and reported it, and that's why Andy was there. 

The fact that the truck belonged to the guy Andy was questioning, and not Richard, is interesting. Makes me wonder if he's working for Richard (given Richard's a Horne and therefore probably also rich), and that's why he's trying so desperately to shoo Andy away. Richard was using the truck to get illegal drugs as well, which also indicates that Richard's underlings (if this guy is one) are expendable to him.

I'm thinking that the scared guy was an informant.

I assumed that the guy asked Andy for two hours so that he could bolt out of town.  When I saw the open door I took that as confirmation of it.  It would be really, really dumb for a law enforcement officer not to detain the owner of a vehicle that was involved in a hit and run fatality, for exactly that reason.

Side question about that scene; where did Andy get a Rolex?

"Richard and Linda at 4:30"..............Andy was at Sparkwood and 28th at 4:30........hmmmm

This would make sense because any police office that found the alleged truck that murdered the victim wouldn't agree to leave, they would call for back up and a forensics team. That said, the cop in question is Andy so...

It was the truck that Richard killed the boy with. The cops are investigating him for a murder, and will eventually stumble upon the drug ring he's also involved with. Of course he's nervous.

He doesn't show up for his meeting with Andy. I wonder if Red killed him.

I totally thought that place looked like Dead Dog Farm. It has the same feeling of unease at the very least. Andy also seems much more confident and knowledgeable in this scene than ever before.

What I thought was the strangest part of that scene was that Andy was wearing a Rolex watch...