If you see a plastic rubbish sack with something inside. Report it immediately!
Remember that your perpetrator will always overreact. As if screaming and shouting proves your innocence,
Selective amnesia. ‘I don’t remember anything about it, Guv.’
‘It wasn’t murder Your Honour. It was a sex game gone wrong.’
Sometimes alibi witnesses lie. ‘We were at home watching Harry Potter.’
Sometimes you only have to look at the police mugshot.
Knock on every front door and ask for doorbell camera footage. See that van driving away? And there’s someone wearing a hoodie.
Look at the victim’s relationships. The pretty young science graduate shacked up with the tattooed cage fighter.
Remember that a defence attorney only has to cast doubt in three jurors to get a mis-trial.
Seize every cellphone to download its call/text history and track its last movements.
Has someone been digging the garden?
Collect every cigarette butt. So that you can test it for DNA.
If the cigarette butt does not yield an exact DNA match, look for familial DNA. Match it to a close relative and work through their family tree until you find the culprit.