A lot of internet tough guys here.
The guy made a mistake, no doubt about that. Toss him a fine, maybe a good deal of community service and a demotion, but prison and losing his job (which will effectively keep him out of the Police Force for the rest of his life if what my friend, also a Police Officer, said is true)? That's really harsh.
They're dogs guys. They're not human.
Agreed, despite the no firearm thing in England. Every summer they do PSAs about "dont leave your so and so unattended in a hot car", a police officer should be very well aware of these things. Its common sense.
"To err is human, to forgive divine."
"Let he who is without Sin cast the first stone."
"Some other line about forgiveness."
When you guys come to me and tell me you've never forgotten anything important, I'll consider thinking otherwise but what I see right now are a bunch of flared tempers over someone making a mistake which cost precisely zero humans their lives or wellbeing. Destroying possibly his entire livelihood is extreme to say the least.
And I'd bet £10 of the Queen's finest pound sterling these are the same guys telling us we're too nanny state and too harsh on people as well. Hypocrisy abound.