I’m back this month still talking about amateur sleuths. This time I want to hone in on one of the biggest challenges in writing an amateur sleuth mystery:

Why isn’t the police department solving the crime?

It may be tempting to solve that problem by making the detective oblivious, lazy, or corrupt. That is taking the easy way out, and unfortunately, readers will notice. Additionally, many mystery fans, including myself, have friends or family in law enforcement. I respect and admire them and do not want to portray them as incompetent.

The strongest amateur sleuths don’t succeed because the police are incapable. They succeed because they have something the police don’t. He or she simply has access to different truths.

—They may know the victim personally.
—They belong to the community and understand decades-old rivalries, family feuds, and secrets outsiders would never recognize.
—Someone may trust them enough to reveal information they would never tell a detective.
—They may bring a professional background to the mystery, like Elizabeth Best in The Thursday Murder Club. Her past as an intelligence operative helps Detective Chris Hudson and PC Donna DeFreitas. It is mutual respect.
— They may have the time to keep asking questions after the official investigation has moved on, like Agatha Christie’s Miss Marple.
—And they have the freedom to notice patterns that don’t fit neatly into a case file, an advantage that the police cannot legally or practically have.

In my own Maine mysteries, setting becomes part of that equation. Small towns have long memories. People remember who dated whom thirty years ago, which family stopped speaking after a land dispute, or why someone suddenly left town after one unforgettable summer. Those relationships create opportunities for an amateur sleuth to uncover pieces of the puzzle that aren’t sitting in an evidence locker.

My protagonist, Raven Ouelette, owns Pine Acres Cabins, knows the people in her community, and is married to the county sheriff. Those relationships naturally give her access to conversations, history, and local dynamics without requiring the sheriff to be incompetent or share too much. As I often say to readers, he does tell her not to get involved, but if she listened to him, I’d have a pamphlet instead of a novel.

I think the best mysteries treat law enforcement with respect while still allowing the amateur sleuth to make meaningful discoveries, as in The Marlow Murder Club, with Judith Potts and DS Tanika Malik. The tension isn’t “good amateur versus bad detective.” Instead, it’s two people approaching the same mystery from different directions, and often with humor.

Readers appreciate that balance because it feels authentic.

Crime fiction asks us to suspend disbelief in all sorts of ways. But when the sheriff misses clues that would be obvious to anyone, or detectives ignore evidence simply so the protagonist can shine, the illusion cracks. Instead of putting down law enforcement, give your sleuth an advantage that’s earned: history, relationships, curiosity, unique access, and a reason to keep asking questions after everyone else has gone home.

That’s when an amateur sleuth becomes believable—and when a mystery becomes impossible to put down (we hope).

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Allison Keeton writes the Midcoast Maine Mystery series. Lobster Red, Book Three, will launch in February 2027. She can be reached at http://www.akeetonbooks.com.