Questions I have after finishing 'The Night Of'

Spoiler alert if you consider changes in Naz's appearance a spoiler
  1. Why didn't Naz just take an uber and avoid this whole mess
    more of a rhetorical/philosophical pondering
  2. Why did Naz shave his head
    again rhetorical
  3. Why did Naz get a neck tattoo
    you're still on trial dude
  4. WHY DID THEY NOT HAVE THE (ALLEGED) MURDER WEAPON IN A PLASTIC BAG 🔪
    Totally skeeved me out every time they all touched in the court room and contradicts all my prior tv watching experiences