Thank you for posting that updated article. At first I thought it was a professional hit - .22's to the head. But leaving the shell casings at the scene seems less than professional.
The horror of Judge Lefkow finding her husband and mother murdered in her home is unfathomable. Prayers to her and her family.
I add my prayers to yours...just a thought here...not sure leaving the shell casings is a big deal, probably a stolen weapon anyway! They'll no doubt recover the bullets and should be able to match them to the weapon, however, if the weapon is stolen they probably won't have much luck because it will have been gotten rid of!
We live in an evil society and it just seems to get worse and worse, am saddened for this woman and her children, can only pray that God holds them in His hands during this difficult time.
If the cases bear fingerprints (tough to get more than a small part of a print on a .22, unless you roll the thing between your fingers), then I'll consider it to be unprofessional. Rimfire cartridges are the most common ammunition in the world, and semi-auto handguns (which can be fitted with sound suppressors) eject the spent brass. Revolvers retain the empties, but cannot be silenced effectively.
The choice of caliber, type of firearm, etc., has "professional hit" written all over it, and unless some informant overhears something, this crime may well go unsolved.