I can only base it on what the affidavit says. It is possible that they mentioned the burning and the guy compiling the AD left it out for brevity. It's also possible that other things they said conflicted, and he left those out because he wanted to get a warrant.
We will not know unless the info is released.
"The following information is in support of an arrest warrant for GREEN. ... Since this affidavit is being submittied for the purposes of securing an arrest warrant, I have not included each and every fact known to me concerning this investigation. I have set forth only the facts that I believe are necessary to establish probable cause to believe that a violation of Title 18, USC, Section 3261, has been committed by GREEN.