I haven't seen anyone ask for the journals. I've seen requests for the "manifesto", which according to early reporting is about 2 to 3 pages. That said...I understand your viewpoint, respect it, but disagree with it.
Let's go further. There is a theory out there that national reporting on school shootings can cause copycats or contagion. I believe this is very possible:
Is news coverage inspiring more mass shootings? Not necessarily, but with each incident comes complicated questions for journalists, says CU Boulder Professor Elizabeth Skewes.
www.colorado.edu
If there's a chance that reporting does do that, is it best that it's not reported at all? If our goal is to stop any chance of causing social contagion or inspiring others, then it's probably best that nobody reports on these situations when the occur.
I'd suggest that surveillance footage, body cam footage and 911 calls should not be released either, if the concern is the inspiration of others with ill intent. These videos are graphic, raw and would be extremely inspiring for anyone dabbling with the thoughts of a mass shooting, IMHO. Frankly, there is zero reason to release any of this in any future cases except to satiate our curiosity or provide transparency.
If the shooter is dead and there will be no public trial, it's likely best that it is ignored and we move on if our concerns are actually about contagion and inspiration.
I'd also suggest that we need to censor those who wrote books or who have detailed videos and information on the internet regarding previous mass shootings. In almost every case I can think of, this type of information is a library card or a click away. IMHO
Ps. I don't think any of the above is how we should address this, but for those who indicate that the release of the 2 to 3 page writing of this shooter will be too negatively inspiring and dangerous..then I assume they would also agree with zero reporting, zero release of information and censorship of information of mass killings for all cases previous, current and in the future to prevent negative impact. If we really want to do "something" to prevent this phenomenon...we should not make it about one very small thing, but cover all bases for safety. Imho