Into the night / Sarah Bailey.

Enhanced descriptions from Syndetics:

After the shocking murder of a high-profile celebrity, Gemma Woodstock must pull back the layers of a gilded cage to discover who among the victim's friends and family can be trusted--and who may be the killer.

Troubled and brilliant, Detective Sergeant Gemma Woodstock finds herself lost and alone after a recent move to Melbourne, brokenhearted by the decisions she's had to make. Her new workplace is a minefield and Detective Sergeant Nick Fleet, the partner she has been assigned, is uncommunicative and often hostile. When a homeless man is murdered and Gemma is put on the case, she can't help feeling a connection with the victim and his lonely, isolated existence.

Then Sterling Wade, an up-and-coming actor filming his breakout performance in a closed-off city street, is murdered in the middle of an action-packed shot, and Gemma and Nick have to put aside their differences to unravel the mysteries surrounding the actor's life and death. Who could commit such a brazen crime? Who stands to profit from it? Far too many people, and none of them can be trusted. Gemma can't imagine a pair of victims with less in common--and yet as Gemma and Fleet soon learn, both men were keeping secrets that may have led to their deaths.

With riveting suspense, razor-sharp writing, and a fascinating cast of characters, Into The Night proves Sarah Bailey is a major new talent to watch in the world of literary crime fiction.