Once out of the alley and away from the sight of the dead older woman, Anthony decided to think logically. What he needed right now was to find the nearest shop with a fireplace connected to the Floo and call the DMLE to do... what it was they did. Anthony didn't actually give much thought to what store as long he did what he was supposed to. It took a bit for Anthony to find the right person to help him, and then there was that whole bit where he had to explain just how he had come across the body - which he had been pretty sure had meant including the part about how he had bumped into Zacharias as that was what had led them to the alley anyway, but the Auror had looked at him as if it hadn't been important, so Anthony had just suggested there be some authorities in Diagon Alley as soon as possible to deal with the dead person in the alley and left it at that.
While he'd waited, he tried not to think too much about the likely reason the woman had been killed and tried to concentrate on other things, like the DA meeting tomorrow and the fact that he wanted to, while not getting anyone's hopes up, discuss what he thought might work for a warning system and the like, though he wasn't very fond of the idea of talking in front of everyone. He wished most that he didn't have to think about it, or not as the case was.
He was startled from his thoughts when the fireplace came to life, but thankful for it and he didn't waste any time to lead the two Aurors right back to the alley he'd left Zacharias in. Resisting the urge to look at the body, he focused instead on a wall instead. He tried not to be very surprised when, as if Anthony's retelling hadn't been quite up to par, one of the Aurors turned to Zacharias.