Murders are usually discreetly done with a syringe sticking out of an attache case or umbrella tip. Nobody even knows that a murder has been committed in the old Soviet Union. It looks like a heart attack or stroke. This was to make a point. You’re right.
Also, I’m thinking there was a reason/purpose to leaving his Ukranian girlfriend, with whom he had one child, unharmed but allowed to witness it.