Originally in : Subterranean, and stile online.
Excellent hard SF from McAuley, in a narrative that gradually reveals more as it progresses. It’s set in his ‘Jackaroo’ series, where aliens have contacted us, and humanity is using their tech, and tech from elder species to expand our horizons.
Some potentially very, very risky alien tech is discovered, and there’s a chase to hunt down the people with it, and to work out just who is behind it. The detective in it is determined to bring the miscreants to justice, but whose justice?