The wedding guest

When LAPD Lieutenant Milo Sturgis needs to get into the mind of a killer he leans on the expertise of his best friend psychologist Dr. Alex Delaware. Delaware and Sturgis find themselves crashing a wild Saints and Sinners-themed wedding reception. A horrified bridesmaid has discovered the body of a young woman dressed to impress in pricey haute couture and accessorized with a grisly red slash around her neck. The party's over and the hunt for whoever killed it is on.