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Essential Tips for Crime Scene Investigation (Updated October 2025)

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  • A whiff of bleach always raises suspicion
  • Always carry a bottle of Luminol
  • 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.

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