Why is this dumb fck still employed in capacity?

Video

After this incident, he "mistakenly" takes home blood evidence. Do officers typically take home blood evidence? Gotta wonder how many cases this one fucks over.

Article: https://www.wbir.com/article/news/investigations/kpd-officer-suspended-for-keeping-blood-evidence-from-deadly-wreck-in-his-home-fridge/51-4ae29160-5958-4571-bc7a-f07e21af2753

 The Knoxville Police Department suspended a 20-year veteran officer for two days without pay earlier this year after an internal investigation found he put vials of blood collected as evidence in a deadly wreck into his home fridge instead of bringing them immediately to KPD's evidence room, documents reveal. 

Two days without pay for being dumb? They reassigned him after the suspension. Again, why does this moron still have a job? He is clearly problematic.