Silent Witness (en Inglés) - Toby Barnes

Charles Donovan is dead.
His apartment recorded everything.
The killer was never seen entering.

On a rain-soaked night in London, a man is found dead in his penthouse at the top of one of the city's most exclusive towers. There are no signs of forced entry. No witnesses. No obvious suspects.

Detective Sergeant Reed and Detective Constable Carter are called in to investigate. At first the case seems straightforward: a wealthy businessman, a complicated private life, and more than one person who might have wished him harm.

But the deeper they look, the stranger the story becomes.

A second death changes everything. The people closest to the victim all have secrets of their own. And the building where the first murder took place seems to hold more answers than anyone expected.

Because Bellmont Tower was designed to watch everything that happens inside it.

The trouble is, on the night of the murder, it saw nothing.

And if the building didn't see the killer...

how did the killer get in?