The Summons

John Mountjoy has escaped from prison and taken a hostage, and the only person he'll talk to is Detective Peter Diamond, who arrested him four years earlier for the murder of a young journalist. Diamond must follow a cold trail to find another killer and clear Mountjoy's name before another life is lost.

This is #3 in A Peter Diamond Mystery.

I personally read this one and loved it. Peter was in rare form!