Evidence is defined as any matter, verbal or physical, that can be used to support the existence of a factual proposition. This seminar focuses on prosecutors most common encounters with evidence during a DUI trial and provides helpful information and tips for DUI prosecutors.      

Topics will include:    

• Motions in Limine
• Corpus Delecti Rule
• Tips to admit blood, breath, urine
• Toxicology

This one-day conference will be led by:

Beth Barnes

Traffic Safety Resource

Prosecutor (TSRP)

GOHS/City of Phoenix

Beth Barnes serves as an Arizona GOHS Traffic Safety Resource Prosecutor (TSRP) through a grant from the Arizona Governor’s Office of Highway Safety and the Arizona DUI Abatement Council. In this role, she serves as a resource for law enforcement, prosecutors, traffic safety professionals, judges, and the community to more effectively address impaired driving and other traffic safety issues. She has been an assistant city prosecutor with the City of Phoenix Prosecutor’s Office for almost 29 years, specializing in the prosecution of DUI cases. Ms. Barnes also serves as the national prosecutor representative on the IACP Technical Advisory Panel for Impaired Driving Programs.   

Tobin Sidles

Oro Valley Town Prosecutor

APAAC Best Practice Chair

Tobin C. Sidles is a veteran misdemeanor prosecutor currently working for the Town of Oro Valley, where he has been the Town Prosecutor for over twenty years. Mr. Sidles is a 1982 graduate of Northern Arizona University with a Bachelors degree in Psychology, and also a Masters degree in Public Administration. He is a 1985 graduate of the University of Arizona School of Law. He has worked for several jurisdictions as a special prosecutor, handling misdemeanors and felony conflict cases.  

Breakfast and lunch from Jason's Deli will be provided to those attending in-person

Hotel rooms will be provided to attendees traveling from outside of Maricopa County who request a room when registering. Attendees traveling from outside of Maricopa County are eligible for reimbursement of meals not provided by APAAC at State Government per diem rates and mileage at 44.5 cents per mile.

*Hotel room reservation cancellations must be received by email to This email address is being protected from spambots. You need JavaScript enabled to view it. by November 15. Attendees who request a hotel room and do not cancel by November 15, 2022, will be responsible for any fees charged by the hotel.