Well, obviously they would be happy and relieved. Their world would not be rocked to its foundations. They would still have one parent in their lives. They would resume more or less normal lives, etc etc.
BBM.
I am not so sure that they would resume more or less normal lives. Even if he is acquitted, BM will not be the same man - he will certainly be diminished financially and will likely struggle to get business, at least for a while. He'll be a pariah in Central and Southern Colorado by the end of the trial and his relocation may or may not fit with the daughters' plans.
And most importantly, the daughters lost their mother, whom they love - IIRC, they burst into tears when her last proof of life photo was presented in the PH. However they rationalize their support for their dad today, they will have to come to grips with the evidence that points to him, and IMO if they don't remain in some sort of Stockholm Syndrome-ish attachment to BM, they will ultimately lose confidence in his denials and his professions of love for them.
If so, IDK what the long term mental health and life impacts could be. This has only recently begun to be studied. Here's an excerpt of an Abstract for a recent study, published in 2018:
Children's perspectives on life and well-being after parental intimate partner homicide
"Background: While there is no doubt that parental intimate partner homicide is associated with strong grief and post-traumatic stress reactions among the children who have been bereaved, there is little in-depth insight into how children and young people see and describe their circumstances and needs.
Objective: Our aim was to shed light on children's and young people's perspectives on their life after parental intimate partner homicide. In particular, we were interested in how they experienced their living arrangements, social environment, and general well-being.
Method: We conducted semi-structured interviews with 23 children and young people (8-24 years old; 15 females and eight males) who had been younger than 18 years when one of their parents killed the other (21 children lost their mother, two children lost their father). We used thematic analysis to synthesize the findings.
Results: While most participants were fairly content with themselves and their living arrangements, they also expressed substantial and persistent difficulties, including distress, conflicts between family members, and feelings of unsafety. Most importantly, children's self-image, their perspectives on their biological parents, and their views on their broader (family) environment varied considerably from participant to participant, and also between siblings.
Conclusions: It is unlikely that straightforward guidelines can be given with regard to where the children should live after parental homicide, or whether they should be in contact with the perpetrating parent. Rather, this study's findings underline the need to explore children's individual viewpoints carefully during decision-making processes."