Death Flight by Sarah Sultoon

Cub reporter Jonny Murphy is in Buenos Aires interviewing families of victims of Argentina' s Dirty War, when a headless torso has washed up on a city beach, thrusting him into a shocking investigation...
Argentina. 1998. Human remains are found in a beat on the outskirts of Buenos Aires – a gruesome echo of when the tide brought home dozens of mutilated bodies thrown from planes during Argentina' s Dirty War. Flights of death, with passengers known as the Disappeared.
International Tribune reporter Jonny Murphy is in Buenos Aires interviewing families of the missing, desperate to keep their memory alive, when the corpse turns up. His investigations with his companion, freelance photographer Paloma Glenn, have barely started when Argentina's simmering financial crisis explodes around them.
As the fabric of society starts to disintegrate and Argentine cities burn around them, Jonny and Paloma are suddenly thrust centre stage, fighting to secure both their jobs and their livelihoods.
But Jonny is also fighting something else, an echo from his own past that he'll never shake, and as it catches up with him and Paloma, he must make choices that will endanger everything he knows...