There is a reason you can't add links with no posts.......first time posters with links tend to link to inappropriate material. Rather than post to the numerous news articles, you posted a link to a company who provided legal services and is advertising theirs. Thus it was removed.
The case you are referring to has nothing to do with staying focused. If anything, it is nothing more than a lesson in that once you make decisions, you can continue and do great things, but you will still be held accountable for your actions and have to deal with such.
Your link is about Specialist Osvaldo Hernandez, U.S. Army, who at the age of 20, got caught in NYC with a handgun. An unlicensed and stolen handgun. He realized he was facing a felony conviction and took a plea, removing the criminal possession of a stolen weapon to merely criminal possession or a weapon, a misdemeanor. He was sentenced to one year and did 8 months.
He got out of jail and joined the U.S. Army where he eventually earned the Combat Infantryman Badge, two Army Commendation Medals and three Army Achievement Medals
E took such to trial and was found guilty.
He gets out of the Army, applies to numerous federal, state and local LEO jobs and was DENIED due to his criminal history. He was granted a pardon by the governor, however no agency would hire him, as he was arrested for a felony. He paid this "firm" you mentioned THOUSANDS to get that pardon. And after he got it, he is in the same place.
His service to the country is commendable, but it does not erase or mitigate what he did. It does not change who he was and what he could become in the future. He will never get a LE job. He has tried unsuccessfully for 8 years. He is now a plumber.
His life and actions should be a lesson to all. You make a bad decision, and you will have to pay the consequences for life. Good action/behavior following your bad choice does not erase what you did or entitle you to the job you want.
-In God we trust. All others, put your hands on the car and don't move.