In 2017, police investigating a double homicide found more than just bodies in a Tampa condo. The founder of a neonazi group was making bombs in the garage.
Sources:
https://www.splcenter.org/resources/hatewatch/visions-chaos-weighing-violent-legacy-iron-march/
https://www.bu.edu/articles/2016/police-release-video-of-suspect-in-hate-poster-distribution/
https://www.rollingstone.com/politics/politics-news/all-american-nazis-628023/

Rabid on the Subject of Segregation: Byron de la Beckwith, Pt 4
1:00:20

Black Monday: Byron de la Beckwith, Pt. 3
58:24

Sons of Mississippi: Byron de la Beckwith, Pt. 2
54:14