Astounding. From the Las Vegas PD’s preliminary report, which you can read in full here:

What about ISIS? Didn’t a Republican congressman tell Tucker Carlson last night that he had “credible evidence” that Stephen Paddock wasn’t the only gunman and that this might have been some sort of jihadi op? Indeed he did. But if he has that evidence, he apparently hasn’t shared it with the LVPD:

If there’s some sort of cover-up here of a terrorist attack, er, wouldn’t Trump necessarily be in on it? The FBI’s part of the investigation. Jeff Sessions is being briefed. A conspiracy of silence about Paddock’s true motive would have to involve some MAGA all-stars.

The cops’ best guess as to motive right now is mental illness. There have been reports before about Paddock being off-kilter but lots of mass killers are disturbed and yet still take the time to articulate their grievances before they act. Not Paddock.

The NYT looked at some of the initial search warrants in the case and reported a week ago that Paddock planned the attack meticulously to avoid detection. He spent a lot of mental energy, not to mention money, to make sure he’d pull this off — yet never once anywhere, allegedly, did he pause a moment to say why despite the near-certainty that he wouldn’t make it out of his hotel room alive. If you’re looking for intimations of a conspiracy, though, here’s an intriguing detail from the Times story:

The F.B.I. also discovered emails between two accounts connected to Mr. Paddock. One from early July indicated that Mr. Paddock had begun taking steps to carry out the attack, referring to a “bump stock,” an attachment that enables a semiautomatic rifle to fire faster.

In an email Mr. Paddock sent on July 6 to an account that also may have belonged to him, he wrote: “try an ar before u buy. we have huge selection. located in the las vegas area.” Another email sent between the accounts read, “for a thrill try out bumpfire ar’s with a 100 round magazine.” By “ar,” Mr. Paddock appeared to be referring to rifles.

The affidavit later adds that “investigators have been unable to figure out why Stephen Paddock would be exchanging messages related to weapons that were used in the attack between two of his email accounts,” and that it was possible that someone else was controlling one of the accounts.

Could he have been emailing his girlfriend, Marilou Danley? Possibly, but the sheriff said at this morning’s press conference that they don’t expect to file any charges against Danley. Could it have been … his brother? More from the presser:

Investigators scanning computers belonging to Las Vegas shooter Stephen Paddock found “numerous” child pornography photos, the city’s sheriff revealed Friday, adding that the FBI is looking into a person of interest in the case

Paddock’s brother, Bruce, was arrested last year by Los Angeles police for possession of child pornography as part of a seperate investigation that began months before the Vegas attack.

Two brothers, each with child pornography in their possession. What are the odds that they were pursuing that twisted hobby completely independently of each other? Not zero, maybe, but not real high either.

One more detail from the LVPD preliminary report. Here’s what they found in the search history of one of Paddock’s web browsers:

More than four months before he started shooting out the window at Mandalay Bay, he was researching open-air events with large crowds. The sheriff notes in the presser that Paddock had lost a significant amount of wealth not long before the shooting, but the browser history suggests he was thinking about a public massacre last spring.