Her brother Brian Leadbeater briefly mentioned in the article above died in 1984 when cops shot him after he went after them with a knife. That incident occurred after he tried to steal a older man's car in a mall parking lot.
In one article about the incident, his (and Roxanne's) mother basically described it as suicide by cop, as her son was troubled and suicidal. Later, though, she and her husband, Brian's father, sued the police for 10 million because they thought the incident didn't justify the use of 24 bullets, although they agreed Brian's death was basically intentional and not surprising. I didn't find the outcome of that, or maybe I haven't yet.
Roxanne was never mentioned. I guess her parents probably thought she was off living her life somewhere. They came across as loving and yet realistic about Brian's issues, albeit in denial (at least at one point) about some of the realities of the incident that led to his death.