Jonathan Mattise FILE - In this Nov. 13, 2019, file photo, Nashville Police Officer Andrew Delke sits in court as attorney David Raybin debates a new trial location at the Justice A. A. Birch Building in Nashville, Tenn. Prosecutors in Tennessee who are preparing for the first-degree murder trial of Delke, a Nashville police officer, next month may try to call a law enforcement expert witness who served similarly in the case against Derek Chauvin in George Floydâs death. (Courtney Pedroza/The Tennessean via AP, File) June 15, 2021 - 3:56 PM NASHVILLE, Tenn. (AP) â Prosecutors in Tennessee who are preparing for the first-degree murder trial of a Nashville police officer next month may try to call a law enforcement expert witness who served similarly in the case against Derek Chauvin in George Floydâs death.