MADD Law Enforcement Recognition Ceremony, June 21, 2025

This past weekend in Waikiki, MADD Hawaiʻi honored outstanding members of law enforcement for their commitment to impaired driving enforcement, education, and prevention. We recognize and thank the following individuals for their dedication to keeping our roads and communities safe:

Officer Jang Hoon Cho – Night Enforcement Unit
In 2024, Officer Jang Hoon Cho continues to exemplify unwavering dedication to impaired driving enforcement and public safety. He led the Night Enforcement Unit with 110 OVUII arrests — the highest among his peers— and assisted in 17 other investigations. Officer Cho volunteers for extra shifts targeting impaired driving and participates in community education events, reflecting his commitment to making Oʻahu’s roads safer.

Officer Daymon Carr – Solo Bike Unit
In 2024, Officer Daymon Carr displayed exceptional initiative and leadership as a solo bike officer with the Honolulu Police Department. He conducted numerous high-quality traffic stops, most leading to arrests for OVUII, excessive speeding, or reckless driving, demonstrating his skill in tackling dangerous driving. Officer Carr personally made 24 OVUII arrests and assisted in over 100 investigations. He often prioritized mentorship, giving up arrest credit to support less experienced officers. His actions reflect his dedication to enforcement and commitment to developing future DUI enforcement professionals.

Detective Tyler Chin – District 3 (Pearl City)
In 2024, Officer Tyler Chin showed a strong commitment to traffic safety while on patrol in Oʻahu’s busy District 3. Though OVUII enforcement wasn’t his primary assignment, he participated in over 90 investigations and made 63 arrests—demonstrating remarkable initiative. His work ethic greatly enhanced public safety and reflected a deep sense of responsibility in one of the island’s most challenging traffic environments.

Corporal Justin McCallum-Shiroma – District 1 (Downtown Honolulu)
In 2024, Corporal Justin McCallum-Shiroma served as a leader and mentor in District 1 Patrol, which covers downtown Honolulu. Known for its nightlife and busy traffic, the district faces constant challenges related to impaired driving. Corporal McCallum-Shiroma prioritized traffic safety, participating in 97 OVUII investigations and initiating stops that identified impaired motorists. He often allowed newer officers to make the arrests, using those incidents as teaching moments to instill strong traffic enforcement skills. His leadership and selflessness have been crucial in shaping new officers while ensuring impaired drivers are held accountable.

Officer Derek Tran – Night Enforcement Unit
Officer Derek Tran is recognized for his outstanding efforts in drug-impaired driving enforcement as a certified Drug Recognition Expert (DRE). In 2024, he made 73 OVUII arrests, including 26 OVUII-drug investigations, and removed 18 drug-impaired motorists from Oʻahu’s roadways. His keen observations and dedication to public safety have had a significant impact on curbing drug-impaired driving. Since joining the Night Enforcement Unit in March 2024, Officer Tran has shown remarkable growth and commitment to the DRE program. In 2025, he has already surpassed his 2024 total with over 38 drug-impaired driving arrests in just three months, demonstrating a relentless pursuit of excellence.

Major James Slayter – Traffic Division
Major James Slayter exemplifies the values of the MADD Prevention and Education Award through his commitment to traffic safety, youth and officer mentorship, and community engagement. As a leader in the Honolulu Police Department, he focuses on enforcing impaired driving laws and building partnerships to strengthen prevention efforts.

In Waikiki’s District 6, he collaborated with stakeholders like Senator Sharon Moriwaki and local boards to address community concerns, especially around traffic and pedestrian safety. Following a fatal pedestrian accident, he worked with community members and officials to implement safety improvements.

His outreach includes “legacy sobriety checkpoints,” bringing together victims’ families, officers, and organizations like MADD to promote healing and awareness. He also educates the public and media on the challenges of impaired driving enforcement.
As a mentor, Major Slayter developed DUI and traffic training tools that have enhanced officer preparedness and courtroom performance, shaping the future of impaired driving enforcement in Hawaiʻi.

Lieutenant Darrel Oliver – Vehicular Homicide Section
Lieutenant Darrel Oliver is a steadfast advocate for victims and families impacted by impaired driving. As commander of the Vehicular Homicide Section, he oversees all critical and fatal traffic collision investigations, many involving alcohol or drug impairment. Under his leadership, cases are pursued with precision, compassion, and a drive for justice.

In 2024, Lt. Oliver led investigations into 54 traffic fatalities, nearly 40 involving impairment. He holds his team to high standards, ensuring every piece of evidence is reviewed, reports are accurate, and cases meet the highest prosecutorial expectations. His efforts often lead to serious criminal charges and reflect his commitment to accountability.

Known for championing complex and emotional cases, Lt. Oliver works closely with prosecutors to overcome investigative and legal challenges. He believes every victim deserves a voice— and their families, answers.

Outside of investigations, Lt. Oliver volunteers his time to support sobriety checkpoints and MADD outreach, standing in solidarity with survivors and victims’ families.