City Justice by Morgan Kelley

Greyson Croft has had enough.
For years, he’s fought for justice playing the bad guy, and he has nothing left to give. With Gilbert Roch killing Paris and Tessa Archer, leaving the twins orphaned, he’s realized that being the good guy, playing the bad guy, just isn’t working for him.
Not at all.
So, he’s given up his hope to clean up Las Vegas the only way he knows how. Instead, it’s a no-holds-barred grudge match, and he’s taking it to the street. Where he wouldn’t kill before, he’s ready to take justice into his own hands. No one is safe.
Good.
Bad.
Innocent.
His family, after all, hangs in the balance, and what wouldn’t he do for family? No matter the toll on his own soul, he will cross countless lines.
Emma and Chris are gone.
The family is fractured and in hiding.
With one last client who happens to find her way to Aquarius, Greyson knows that this is his final stand. When he’s done, justice will be served, City Justice will prevail…
And he… he will be no more.
For family, it’s a sacrifice he’s willing to make.
Vegas has won.
Death is coming.
And nothing will be the same ever again…