Without Trace — Rae Richen

In Without Trace, A Glyn Jones and Grandma Willie Mystery, When hip-hop drummer, Trace Gowan is kidnapped from a street corner, his friend Glyn Jones and the rest of the band work the underground to find their friend. They soon find that there is way more going on than they ever guessed. But they stick with the plan because they care about their brother. 

Glyn and his Grandma Willie experience what it is like for whole groups of people to be afraid to ask for police protection.

But Grandma Willie knows which groups of policemen do care. And she knows how to get help for the police from those they are least likely to think of as a source of strength.