Mental health issue in driver as well.

https:// www.theguardian.com/uk-news/2018/feb/01/finsbury-park-london-mosque-van-attack-darren-osborne-makram-ali

In popular science:

DARPA Wants to Install Transcranial Ultrasonic Mind Control Devices in Soldiers' Helmets

By Clay Dillow September 9, 2010

Have they done this?

https:// www.popsci.com/technology/article/2010-09/darpa-wants-mind-control-keep-soldiers-sharp-smart-and-safe