He was smirking when Dinah returned from the kitchen empty-handed, but he tried to hide it. Alfred let no one in his kitchen unless he was too far from it to stop them. Or asleep. Bruce was content to stay away, but he and each of his boys had often found their way there after patrolling at some time or another, to refuel. Often with interesting results.
She would get her drink, and eventually she would grow accustomed to allowing Alfred to take care of her. That would take some work, but it would be Alfred who insisted, and who wore her down. In a gesture of appeasement, he took a real drink of his vesper, no longer making faces, readjusting to the taste, even if he didn't like it. Bruce wasn't excited by that, but it made it easier to drink if he was going to.
The glass found its way to his mouth again as he considered the Maria's problem more thoroughly. "It could be a hit," he said with a nod to Dinah. A killer for hire; someone is giving him information. That still leaves us with how the information is being disseminated, bringing us back to hacker versus mole, and either way you have someone with an agenda. If it's specific to your victim, there's a reason. He was part of something the killer needed vengeance for. If not..." He emptied his glass.
"The killer has put a disproportionate amount of effort toward your victim for it to either not be personal, or not part of something bigger. If it's a hacker, he has a tap into your records, and whomever he's targeting is fair game. If it's a mole, he's using SHIELD as a cover for his crimes. I'd start by taking a look at the possibility of an agent being in the vicinity of the victim at time of death - but I'd also take a look at anyone else you've put into hiding. I suspect a few of them have gone missing, as well." He got up and wandered toward the bar to refill both his and Maria's glasses.