Expert Profiles

Alan McCann

Alan McCann was a member of the San Francisco Police Department for 33 years and has more than a decade's worth of experience as an investigator. Trained in accident investigation and reconstruction, Mr. McCann has conducted over 1,000 DUI investigations and made over 600 DUI arrests. Mr. McCann holds basic, intermediate, and advanced POST (Peace Officer’s Standards and Training) Certificates. He was also awarded the San Francisco Police Department’s highest honor, the Gold Medal of Valor.

Hallee Weingarten

Forensic toxicologist, Halle Weingarten, formerly headed the DUI break alcohol testing program at the Santa Clara County Crime Laboratory. She has trained police officers how to properly use the breath testing devices employed in DUI investigations, and was responsible for maintaining the devices used in Santa Clara County.

She has qualified as an expert in DUI cases in California Superior Courts and her articles have been published in scientific journals. Furthermore, Ms. Weingarten is a lecturer and teacher to other scientists regarding the field of forensic toxicology.

Paul Cavallero

Investigator Paul Cavallero has conducted over 200 DUI investigations and regularly testifies in court as a witness on behalf of our clients. As a member of our firm for over 3 ½ years, he is responsible for gathering client discovery, delivering client motions to all Bay Area county courthouses, and photographing arrest locations.