Suspect in killing of retired police captain was once sentenced to 7 years but served no time

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ST. LOUIS (KTVI) – The man charged with killing retired St. Louis police Captain David Dorn was previously convicted in 2014 but never served a day in prison.

Stephan Cannon, 24, was sentenced to seven years for felony robbery but the judge gave him a break. Cannon got probation under what’s called a suspended execution of sentence (SES). Court records show that even though Cannon twice violated probation, he never went to prison.

Cannon now faces a first-degree murder charge in Dorn’s June 2 killing.

Dorn was protecting a pawnshop from being looted. St. Louis police released video of suspects looting that night.

Officer Robert Howard said he was relieved to hear about the arrest. He said Dorn inspired him when he was just starting out in law enforcement decades ago.

“I am thankful the police department got on top of that and I would also like to thank, if there were any witnesses or anybody who stepped up to the plate, these are the things that we need and I’m thankful for that,” he said.

Howard met the captain about 20 years ago.

“Captain Dorn was amongst other police officers that I had an opportunity to run into before even getting the opportunity to work in law enforcement,” Howard said. “Those were the individuals I looked up to. They wore the uniform with pride.”

Moline Acres officer Derrick Sutton worked under Dorn for five years when he was chief of police in Moline Acres.

“When you went to work, you wanted to do more than just your job, and I imagine that’s with most officers, but with Dorn it was like, ‘I want to do my job. I want to do more than my job,’” he said.

Sutton said Dorn was a father figure to many people.

“It was just an aura that he had,” he said. “I had no idea the magnitude that the spirit of Dorn has touched, so I can’t even imagine you know, what the family is going through because of how I feel right now.”

CrimeStoppers had offered a reward that grew to nearly $60,000 before Sunday’s arrest. Representatives did not indicate if it was a CrimeStoppers tip that led to the arrest.

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