I was offered a police caution for outraging public decency, long story short, I was depressed and had had enough with my crappy homelife/people causing me **** and one day ended up drinking alcohol, too much and apparently did lewd stuff on a bus. I had a voluntary interview earlier this month, the allegation/incident was in the middle of November. When offered my caution, my fingerprints and photo were taken, as well as DNA swab, but I was not arrested, was told it's standard practice when being issued a caution.