I think the brother of sandyhook became jacksonville

brother's voice is in a video in this page, listen to the voice and notice the neck also

http://www.dailymail.co.uk/news/article-2248327/Ryan-Lanza-Moment-brother-Adam-Lanza-saw-CNN-mistakenly-report-Sandy-Hook-shooter.html

this is Bread the Jacksonville shooter, timestamped and the shots can be heard right after so warning about that

https://youtu.be/83KXmb-7mSY?t=1m46s

IMO they are the same person