If this story doesn’t get your blood boiling, then nothing will.

All it took was the gunshot fired outside his Walker County home to trigger training ingrained in former Navy SEAL Marcus Luttrell, the lone survivor of a dramatic battle in Afghanistan in 2005.

He did a sweep through the house. Checked on his mother. And bolted out the door, where he found dead his beloved Labrador retriever, Dasy, a dog given to him to help him recover from his own wounds and the loss of his fellow Navy comrades.

“I could tell she tried to get away because there was a blood trail,” Luttrell recalled in a phone interview Wednesday. “When I saw she was dead, the only thing that popped into my head was, ‘I’ve got to take these guys out.’ ”

Shrouded in darkness, Luttrell, who’d just been released from the hospital after another round of surgery, crawled under a fence, skirted a ditch and sneaked up on four strangers in a sedan who apparently killed the dog on a whim. Luttrell said they were oblivious as he raised a 9 mm pistol from about 25 yards away and had one of them dead to rights.

But as the car pulled away, he didn’t fire.

Instead, he scrambled back to his pickup and launched what became a wild 40-mile chase that reached speeds of over 100 mph and crossed three counties.

“I did everything right; I didn’t do anything wrong,” he told the Houston Chronicle of the April 1 incident. “Make sure everyone knows they cold-bloodily murdered.”

Luttrell stayed on the line with a 911 emergency operator as he tried to catch the car, which was just a bit too fast for his four-door truck to overtake.

“I told them, ‘You need to get somebody out here because if I catch them I’m going to kill them,’ ” Luttrell recalled telling the operator.

The nighttime killing of a such a special dog played right into Luttrell’s deep wounds.

The 4-year-old yellow Lab was given to him upon his return from the war to help him heal. He named it Dasy as an acronym for his SEAL team members lost in a mighty fight in which they were isolated and far outnumbered by Taliban fighters.

He wrote a book, The Lone Survivor, about the experience.

Luttrell said he still wrestles with what he went through. He doesn’t sleep at night, usually keeping his guard up until sunrise, just in case.

“I don’t talk about it much. I just don’t sleep at night,” he said. “I am in and out of the house all night, going, moving around.”

Luttrell and the men he was chasing were finally stopped by Onalaska Police Department.

Luttrell said he confronted the men. “I was like, ‘Which one of you guys killed my dog?’ ” he said. “They started talking smack.”

The police sent Luttrell home, and the Texas Rangers have been working with the Walker County Sheriff’s Department.

So far, two men have been charged with felonies that could land them in state jail for at least six months.

Michael John Edmonds II, 21, and Alfonzo Hernandez, 24, both of New Waverly, are charged with cruelty to nonlivestock animals. The driver of the vehicle was arrested on suspicion of not having a license.

That story brought tears to my eyes… of both sadness and anger. What kind of sick f*** do you need to be to murder a dog? It’s even worse considering who the dog belonged to, and that the reason Luttrell got the dog was to help him deal with losing his fellow SEALs. He lost his entire team. His dog Dasy was named for four of the men on his team — each letter is for one of their names.

And after they slaughtered his dog, they taunted him. Fortunately, he set the punks straight.

The Texas Rangers arrive and these guys, when the Texas Rangers are taking these guys away, Marcus has held them there by a gun. As the Rangers are taking these guys away, they’re threatening Marcus’ life and saying, “When we get out, we’re coming for you next. First it was your dog. It’s going to be you next. You don’t know who you’re messin’ with.” That’s when Marcus kind of snapped just a little bit and said to the Ranger, “Excuse me, ranger, do you know who I am?” He said, “Yes, sir, Mr. Luttrell, I do.” He said, “You might want to explain to these punks because I could have killed them 600 different ways and if I wanted to kill you guys after what you would have done what you just did to my dog, I would have pulled you down into my basement and I would have tortured you for days and you wouldn’t have died until you begged me for death. So before you start saying you’re going to come after me, you better learn who you’ve just whose dog you just killed.”

Shitheads. There’s really nothing else to say. Marcus Luttrell is a hero whose boots they don’t deserve to lick. He has gone through so much defending this country, and he comes home and this is what happens? I’m also a little curious as to where PETA’s outrage is in this. So far, there’s nothing.

It makes me sick to my stomach.

Hat Tip: Rachel Lucas