At roughly 17 minutes into the show, Horatio says that the trace chemicals on Brian's body were benzene, xylene, and ethanol. He goes on to declare that it is gasoline. However, benzene and xylene are unwanted compounds in gasoline due to hazardous combustion products and other unfavorable combustion characteristics. While trace amounts of these can exist in gasoline, ethanol is a common additive. Short chain non-cyclic hydrocarbons make the bulk of gasoline, but these were not detected. Ethanol would have evaporated before any of the other compounds, and if benzene and xylene were left, there are other explanations than gasoline.
Salumeh Farooq douses her husband and the floor around him with gasoline. She drops in a lit match into the gasoline and berates her husband for several seconds. Then, the gasoline ignites. However, the gas fumes should have ignited instantly. After several seconds, the pure liquid gas would have smothered the flame of the match.
Kyle Harmon's character at the end of season 7 is a civilian. Now he is a U.S. Army soldier who has gone through the enlistment process, waited, reported for basic and advanced training, gone to a language school and become fluency in Farsi, trained and deployed to Afghanistan for at least a year (At that time Army deployments were a year). There is no way he could have done all of these things in the elapsed time of the show, even if you leave out the language school.
He is supposedly on leave, but is in Miami having a meal with Horatio while wearing his uniform, and he is wearing in IR flag (which is only worn in theater - outside of a war zone the full color flag is worn) and he has no deployment patch on his right sleeve (A soldier is not required by reg to wear one, but few soldiers who have earned a deployment patch would ever go without it as it says that you have "been there and done that" and sets you apart from soldiers who have not deployed). This alone would get him in hot water. After the scene at his friend's house he spends the rest of the episode with no top for his uniform, only his tan t-shirt. He is frequently outside with no head gear (patrol cap or at the time beret). He also stands around with his hands in his pockets which is also not allowed in uniform, and his haircut would be considered borderline, especially as it is implied he is said to be transferring to an Infantry unit (The 19th Mountain which is fictitious). Add the tantrum he throws and his character becomes almost painful for a soldier or veteran to watch.
He is supposedly on leave, but is in Miami having a meal with Horatio while wearing his uniform, and he is wearing in IR flag (which is only worn in theater - outside of a war zone the full color flag is worn) and he has no deployment patch on his right sleeve (A soldier is not required by reg to wear one, but few soldiers who have earned a deployment patch would ever go without it as it says that you have "been there and done that" and sets you apart from soldiers who have not deployed). This alone would get him in hot water. After the scene at his friend's house he spends the rest of the episode with no top for his uniform, only his tan t-shirt. He is frequently outside with no head gear (patrol cap or at the time beret). He also stands around with his hands in his pockets which is also not allowed in uniform, and his haircut would be considered borderline, especially as it is implied he is said to be transferring to an Infantry unit (The 19th Mountain which is fictitious). Add the tantrum he throws and his character becomes almost painful for a soldier or veteran to watch.
After Natalia and Jesse find inch-deep heel marks in the ash of the burned garage, Wolfe determines by crushed ash on the tips that they were made after the fire began. When confronted with the evidence, Salumeh Farooq recounts setting her husband on fire. However, when she starts the fire, she is standing on concrete, away from the fire trail. She then runs away and doesn't come back. Since the fire department, paramedics and police showed up quickly, Salumeh could not have come back to stand in the ash over the body. The plot fails to explain how her heels could have been inch deep in ash.