Re: 18 Months
"It was due to the prior felony convictions "
The USA doesn't have a justice system, it has a legal system (but this is true everywhere and one of the first lessons all aspiring lawyers have rammed down their throats no matter what university they go to)
Unlike every other legal system worldwide, the US criminal legal system pivots on revenge, retaliation and retribution. Most of the rest of the world realised a long time ago this leads to endless escalation and work on repair, reconciliation and prevention(cycle-breaking) instead.
Unfortunately the USA is hellbent on exporting their versions of law, democracy and religion to the rest of the world.