And So We See Darkly by Cole McCade

COP KILLER.
That’s the accusation scrawled on the home of a dead man, found executed in his own bedroom. That’s the tawdry headline thrown around every news channel, every social media feed, every conversation taking over Baltimore.
That’s the name given to a man who may have been innocent, but never had the chance to prove it — and now Malcolm and Seong-Jae must solve his murder. A death that never should have happened; a death on their watch, when legal technicalities tied their hands.
But with the paternity test results hanging over his head, Malcolm grows increasingly erratic, threatening to take his mind from a critical case that could tear Baltimore and the BPD apart. With a dead cop, a dead suspect, and the question of what to do about Juliette and Chrysanthe, there are no easy answers.
Only with Seong-Jae can Malcolm keep himself together.
And only with Seong-Jae will he find the path he needs to tread.