The D.A. Holds a Candle - George Kelley Paperback …
https://library.buffalo.edu/special…ey/plot-summaries/detail.html?ID=81
Madge Trent adult female, "blonde, trim, graceful, poised.blue eyes", gambling parlor hostess. ... Carlo Handley is a heroin addict and heroin is used to knock out Madge Trent, witness to the murder of Emil Watkins.