Chapter VIII

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President - Mark Williamson

Mark Williamson is a Criminal Investigations Sergeant with the Collier County Sheriff’s Office. Mark has been a law enforcement officer for over 20 years and worked in Virginia as an LEO prior to moving to Florida.  He has two children and he enjoys camping, biking and golf.  Mark has been a member of the Police Unity Tour since 2006.  He feels humbled each year to see so many law enforcement brothers and sisters support one another through the PUT and is honored to join others in keeping the memories of our fallen heroes.

1st Vice President - Dave Northway

Dave Northway is the Public Information Officer and has been with the Tallahassee Police Department since 2001. Dave joined the Police Unity Tour in 2005 and serves as the Co-Director of the Tallahassee Chapter. Dave works part-time at a local bike shop and tries to fit bike rides in with his wife, who is a Sheriff’s Deputy and fellow PUT member. Dave continues to promote the PUT in the northwest Florida region with local bike rides, golf tournaments and various fundraisers to endorse the survivors and their families.

2nd Vice President - Griggs Wall

Griggs Wall is a Master Police Officer with and has been with the City of Gainesville Police Department (GA) since 1992. For the last 3 years Griggs has been assigned to Gainesville High School as a SRO.  Griggs joined the Police Unity Tour in 2010 and serves as a chapter ride marshal.  Griggs is married to his wife of 24+ years, Lisa, and they have one son. When not working or with family, Griggs is a year round cyclist riding the roads in the North Georgia mountains.

Treasurer - Hugh Miller

Hugh Miller has previously served as our President. Hugh retired from the Tampa Police Department. He is a charter member of Chapter VIII and has previously served as our President. Hugh started his professional life in the hospitality industry managing restaurants. After being robbed one night he decided he would rather be catching bad guys than being a victim. He started his law enforcement career as a reserve officer in Huntsville, Alabama.

Secretary - Tiwanda Shaw

Tiwanda Shaw is the surviving spouse of Officer Craig L. Shaw of the Lancaster, Texas Police Department. Craig was killed in the line of duty on Father’s Day, July 20, 2010. Tiwanda’s husband and their 2 children were active bike riders, but she had no interest in riding a bike. After her husband was killed she knew this was something that would make her husband proud. After not riding a bike in 30 years, she decided to make the 250 mile journey with the PUT in 2011. Tiwanda is also the CEO of the Officer Craig L. Shaw Memorial Foundation and volunteers with the Lancaster Police Department to develop a community outreach program.

Director of Support - Chris Warden

Chris has been working for the Collier County Sheriff's Office for almost 27 years. She was recruited by former president Krista Williamson to join the Police Unity Tour Chapter VIII.  Little did she know how it would become an important part of her life. It has been an amazing experience, one that she will cherish for the rest of her life.

Immediate Past President - Mark Trexler

Mark Trexler is a Master Deputy at the Polk County Sheriff’s Office and has been in law enforcement for over 20 years; he has been a member of the Police Unity Tour since 2006. Mark has been both a rider and a support member for the chapter. In his first year riding, Mark rode in honor of a member from his own agency and found that to be a very challenging year. Mark is married to his wife of 20+ years, Dawn, and they have no children. He enjoys being outside riding his bikes or playing in the dirt with his jeep. 

Trustee - Krista Williamson

Krista Williamson has previously served as our President. She has worked for the Collier County Sheriff's Office since 2000 and currently works as a Media Relations Specialist (PIO). Krista started her law enforcement career in 1990 at the Chesapeake Police Department in Chesapeake, Virginia. Krista spent time as both a dispatcher and a law enforcement officer before moving to Florida in 2000. She has been a member of the Police Unity Tour since 2006. 

Trustee - Andy Raphael

Andy Raphael has previously served as our President. He is a police officer at the Winter Garden Police Department

Trustee - Jeff Kerr

Jeff Kerr has 23 years experience in law enforcement and is currently a Lieutenant at the York-Poquoson Sheriff's Office. He has been a member of the Police Unity Tour since 2005 and previously served as a Vice President of Chapter IV. Jeff was diagnosed with MS in 2006 and has held several leadership positions with the National MS Society. He has had a highly successful MS bike team since 2006. Jeff also owned and coached a BMX race team from 2010 to 2015. 

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