I hope that the FBI will discover the messages on those encrypted apps upon his phone. In the past, I have used Signal, WhatsApp, and Telegram. I haven't had any of those apps on my phone for a couple of years. Currently, my phone has GroupMe. If the FBI is able to break through the encryption upon the apps on Crooks' phone, I really, really do hope that the FBI shall honestly release relevant information regarding Crooks and his motivation for shooting Donald Trump.
		
		
	 
I will put on my conspiracy theory hat for a moment just for fun (or maybe not)
Crooks was the "perfect shooter" in the sense that he seemingly had no motive, no political affiliations, leaned conservative (which is contradictory), was a total ghost online, and apparently acted alone
he also, conveniently, had some searches involving both Trump appearances and Biden
I always ask "who benefits from a given crime?"
very simple: the deep state, the DNC, and ultimately, Kamala Harris. 
Scenario One: the assassination of Trump is successful. Biden stays in the race and wins the election. Why? Because Trump had not named a running-mate, and all the 200 million+ dollars in his campaign war chest would have gone back to the donors. The GOP would have no nominee, and no money. Six months after Biden is reelected, he steps down because of his health, and Kamala becomes president. 
Scenario Two: the assassination is unsuccessful. Conservatives get blamed, but Biden still suffers in the polls. Dems use the opportunity to force Joe out of the race and coronate Kamala without an open convention or any input from voters (where we are now).
Scenario Three: the shooter goes after Biden instead, and succeeds. Kamala Harris becomes president
In every one of those scenarios, the DNC and deep state get what they want: Harris as president, or at least as nominee