HN user
The father stacked the deck against himself and his family through his criminality. This has nothing to do with being a bright person (though, one that clearly wasn't bright enough to consider the consequences from committing this crime, and like, not do it).
Though, do bear in mind you're reading the clearly biased account of the person's son or daughter, who seems to be in denial that their father did anything much wrong in the first place.
If the father worked in finance (which seems somewhat implied here) and got imprisoned for committing a financial crime, it seems reasonable for that to be an ongoing stain on his professional reputation.
How about mourning for the people he actually killed?
Rather than mourning for the killer finding it more difficult to engage in his hobbies, while he experiences the consequences of killing two innocents.