Las Vegas Cybertruck bomber Matthew Livelsberger “preyed” on his first wife and mocked her struggles with depression — years before he shot himself in the head and blew up his explosive-laden vehicle, one of her friends has claimed. Stacie Wilssens, who was neighbors with Livelsberger and his now-ex-wife, Sara, in Colorado Springs, recalled the highly decorated Army member as “bizarre and unhealthy” after she started to get to know him around 2012.