Chase James Hadley. The Guilty Are Afraid

St. Raphael was the place they called Vacation City - a millionaire's playground of exclusive clubs and pretty girls with expensive tastes.
Inquiry Agent, Lew Brandon, flew to the City after receiving a message from his partner that he was involved on a big case and needed help ; Brandon didn't realised just how fast until he arrived in St. Raphael and found Jack Cheppey dead - pierced clean through with an ice pick.
Suddenly it seemed that everyone wanted Brandon out of town. The police made it clear he wasn't welcome and an influential millionaire threatened to make his stay very unpleasant. But somewhere in Vacation City a murderer was having himself a holiday. Lew Brandon meant to find him and the mysterious blonde who was the last person to see Jack Cheppey alive.