Sorry for the late reply… From what I read I like it. You set up the anticipation for the Major early on in the scene so the reader can start making opinions about him (is he a jerk, a hardass, the serious no playing type of guy) Good job.
For the dialogue, I would take out some of the 'he said', 'he sighed' and naming the characters. In the car scene, I know that it is just Jason and Johnny so having that constant reminder breaks up the flow of the scene. If you introduce a new character then, yes, restated who is talking, otherwise your reader can keep up.
Okay, this part of the interrogation… I will put my comments in parentheses.
“Hello Jason.((I would say the characters name here, like an introduction)) Would you like something to drink? Perhaps something to eat?” Alex Devereux asked. He was a gruff looking man with small beady dark brown eyes, and buzz-cut brown hair. The sound of his deep voice reverberated off of the walls, making Jason a bit uncomfortable. Wrinkles showed on the man’s face due to, Jason assumed, stress from his rank. The shape of his broad shoulders and muscular arms was only accentuated by what he was wearing. ((great description))
“No thanks.” Jason answered. So far he wasn’t getting why Johnny was concerned of this man’s presence. ((I would comment more about why Jason seems unconcerned. Maybe something about past authority figures that seemed scarier then him or he has down scarier things….))
((This turn of personality happened WAY too fast. Build of the tension. Draw it out like he is the good guy, wanting to help Jason. Get Jason and the reader to let their guard down then hit us with the personality switch.))“Well, it doesn’t matter even if you had said yes. I wouldn’t have given you squat, you little worm! And it’s no thanks, sir!” Alex said, slamming his mighty hands down, and leaning over the table. Spittle hit Jason in the face. He turned one of his hands into a tight fist to try to keep himself calm.((Can Jason control his power?, maybe he loses control a little bit and his cheeks flush a crimson red, grits his teeth and a faint smell of smoke permeates the air….? Keep teasing the reader about a possible catastrophe and reminding us that Jason is powerful))
((Also, if this Alex is a major, wouldn't he be more in control? They are pretty tight on their emotions to get that rank so I would think he would be manipulating Jason and his emotions… maybe showing him a picture of the fire to get a reaction and playing off that, and if he didn't get one then he could explode…))
“Take it easy, Major Devereux.” Clark requests of him in a respectful tone. ((Clark requested in a respectful tone)) Alex settled himself back into his chair, and straightened his tie.
“So Flayme, why’d you do it?” Devereux asked.
“I didn’t do anything.” Jason answered.
“Well, according to witness statements you were the first to run outside before the fire took hold.” Clark states. “People were hurt, Jason.” Jason sits silently, looking down sorrowfully. Alex and Clark also remain silent. Clark breaks the silence.
*** You told us a bit about Alex but nothing about Clark, unless you described him earlier on.
Alex seems like a condescending jerk, such as calling Jason "Flayme" making fun of him and belittling him. If that's the way you want to portray that character you're doing great lol!
I would be interested to read more. Your concept is a good one. Hope this helps.
Penstorm