Cika wannan jumla: A cikin saƙonnin rubutu na rukuni, Thomasberg ya yi magana game da harbi mai launin fata da ya aikata kuma yayi magana game da amfani da LSD. Ya kuma nuna "sanin yadda ake kera bindiga" kuma ya samu kayan aiki don wannan manufar. Ya ce cewa
Poway majami'ar harbi "Coulda kasance haka mai kyau" da kuma kira Robert Gregory Bowers da Brenton Tarrant tsarkaka. Ya kuma gaya wa abokinsa <unk> wanda yanzu ya zama mai ba da shaida <unk> cewa yana "ɗauke da isassun kayan aiki da kayayyaki don saita sabon babban ci kuma ba zai so ya bayyana hakan ga ɗan sanda ba"; Matthews ya ba da shaida cewa "sabon babban ci" yana nufin yawan mutanen da aka kashe a cikin harbi. An kuma bayyana cewa Thomasberg ya horar da dabarun kare kai ga mutumin da ya harbe kuma ya kashe Bao Hung Van a Fairfax County, Virginia a 2018. Alkali Theresa Buchanan ya kira shaidar "mai matukar damuwa" kuma ya ki amincewa da belin.