True Stories, Stranger than Fiction

The Memoirs of Graham Dunne

When you join a police department in a big city, you have been handed a ticket to the greatest show on earth. The Jagged Blue Line is the police officer memoirs of Graham Dunne, whose Law Enforcement career spanned 27 years. From 8 years on SWAT, as both a sniper and operator, to working patrol in the hood, Graham was in the rare breed of crime fighters who fearlessly hunt the worst of the worst.

About Graham Dunne

Sergeant Dunne is a former U.S. Marine with a distinguished 27-year police career. He served as a SWAT officer and sniper for eight years and spent another eight years as a full-time academy instructor. He is highly decorated, receiving the Police Medal of Honor, the Distinguished Service Cross, and multiple life-saving awards. Since 1999, he has been a certified instructor in pistol, rifle, and shotgun, teaching firearms, self-defense, and active shooter response to thousands of military personnel, civilians, and law enforcement officers nationwide.

Sergeant Dunne was the lead firearms and combatives instructor for the Steel Curtain contract, serving a U.S. Intelligence client. He is a recognized expert witness in federal court on firearms, edged weapons, and self-defense. A seasoned competitor, he has fought in MMA, boxing, and kickboxing at both amateur and professional levels, and has over 20 years of competitive shooting experience. He is also a Colorado Police Combat Pistol Champion.

In addition to firearms training, Sergeant Dunne provides executive protection for high-profile clients, including NFL owners, celebrities, and foreign royalty. He founded Ragnar Tactical in 2002 and continues to teach year-round.

Where to Purchase The Jagged Blue Line

Amazon (Hardcover)

Amazon (Paperback)

An Eclectic Cast of Characters…

The Jagged Blue Line is the highlights and lowlights of one police officer’s career. From lawsuits to shootings, fights and high speed car chases, countless death investigations and sexual deviants, Graham’s law enforecement career was filled with incredible stories that are stranger than fiction.

Many of the stories in The Jagged Blue Line are exciting, others are tragic. Some stories are crazy, and some are just funny. Take a look into the outrageous world of police work from the perspective of a street cop. Head on over to Amazon to get your copy of the book today!

My Background & Philosophy

Fortis Fortuna Adiuvat

Ragnar Tactical

Ragnar Tactical is one of Colorado’s top firearms training schools. The instructors, led by Sgt. Dunne, have extensive police and military backgrounds. SWAT officers, including a SWAT sniper, and full time police academy instructors. Ragnar offers the finest instruction available, in a non-threatening environment, with an emphasis on firearms safety. To date, we have trained more than 5,000 people in Colorado. Don’t leave your training to amateurs!

We also offer training in advanced techniques including real-world scenarios such as low-light situations, firing with one hand, and firing while moving. So if you’re want firearms training from someone who has actually used these skills in real life, check out the Ragnar Tactical website by clicking the button below.

Susan D.

“5.0 out of 5 stars A great read! Real world experience and perspectives from a cop who has seen the highs and lows of law enforcement. An enjoyable read that I couldn’t put down.”

Scott S.

“An unpretentious, no holds barred look at the day-to-day work of a dedicated, big city officer. A simply written, down to earth whirl wind tour of the crazy, oft times insane, experiences of workin’ the ‘hood that I couldn’t put down. It certainly gave me a new perspective and appreciation for what it’s like to be a cop. Astonishing, befuddling, sad, comical, frustrating, eye opening, horrifying; just read it.”

Chris R.

“This book was exactly what I would hoped it would be, an unedited depiction of what cops experience on a day to day basis. The Author does a great job telling his story along with the ups and downs of a selfless job.”

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Why I do What I do

“We don’t rise to the level of our expectations; we fall to the level of our training.” -Archilochus, Greek Soldier 650 BC