Wander in the Dark by Jumata Emill

In this new pulse-pounding thriller from the author of The Black Queen, two brothers must come together to solve the murder of the most popular girl in school after one of them is caught fleeing the scene of her death.
Amir Trudeau only goes to his half brother Marcel's birthday party because of Chloe Danvers. Chloe is rich, and hot, and fits right into the perfect life Marcel inherited when their father left Amir's mother to start a new family with Marcel's mom. But Chloe is hot enough for Amir to forget that for one night.
Does she want to hook up? Or is she trying to meddle in the estranged brothers' messy family drama? Amir can't tell. He doesn't know what Chloe wants from him when, in the final hours of Mardi Gras, she asks him to take her home and stay—her parents are away and she doesn't want to be alone.
Amir never finds out, because when he wakes up, Chloe is dead—stabbed while he was passed out on the couch. And in no time, Amir becomes the only suspect. A Black teenager caught fleeing the scene of a rich white girl's murder? All of New Orleans agrees: the case is open-and-shut.
Amir is innocent. He has a lawyer, but unless someone can figure out who really killed Chloe, things don't look good for him. His number one ally? Marcel. Their relationship is messy, but Marcel knows that Amir isn't a murderer—and maybe proving his innocence will repair the rift between them.
To find Chloe's killer, Amir and Marcel need to dig into her secrets. And what they find is darker than either could have guessed. Parents will go to any lengths to protect their children, and in a city as old as New Orleans, the right family connections can bury even the ugliest truths.