In the TV shows, the criminalistics team uses a blue light to detect places were there used to be blood but it was cleaned, how do the TV hitmen clean that blood
![Forensics UV Light - Crime Scene Investigation, Detect Invisible Markings, Fake Money, Scorpions, More Forensics UV Light - Crime Scene Investigation, Detect Invisible Markings, Fake Money, Scorpions, More](http://infinity-gear.com/432-large_default/forensics-uv-light-crime-scene-investigation-detect-invisible-markings-fake-money-scorpions-more.jpg)
Forensics UV Light - Crime Scene Investigation, Detect Invisible Markings, Fake Money, Scorpions, More
![Fingerprints seen with an UV-light torch for police crime scene investigation, IPOMEX, Munster, Germany Stock Photo - Alamy Fingerprints seen with an UV-light torch for police crime scene investigation, IPOMEX, Munster, Germany Stock Photo - Alamy](https://c8.alamy.com/comp/BA6WX8/fingerprints-seen-with-an-uv-light-torch-for-police-crime-scene-investigation-BA6WX8.jpg)
Fingerprints seen with an UV-light torch for police crime scene investigation, IPOMEX, Munster, Germany Stock Photo - Alamy
![Bathroom - Place Of Crime Under UV Light Stock Photo, Picture And Royalty Free Image. Image 66457657. Bathroom - Place Of Crime Under UV Light Stock Photo, Picture And Royalty Free Image. Image 66457657.](https://previews.123rf.com/images/couperfield/couperfield1611/couperfield161100014/66457657-badezimmer-ort-des-verbrechens-unter-uv-licht.jpg)
Bathroom - Place Of Crime Under UV Light Stock Photo, Picture And Royalty Free Image. Image 66457657.
![Developing of blood stains and footprints with uv light. Cleaned bathroom under uv light after crime. | CanStock Developing of blood stains and footprints with uv light. Cleaned bathroom under uv light after crime. | CanStock](https://cdn.w600.comps.canstockphoto.com/developing-of-blood-stains-and-stock-photo_csp42260143.jpg)
Developing of blood stains and footprints with uv light. Cleaned bathroom under uv light after crime. | CanStock
![A ghost rises from the body of a dead man outlined with glowing chalk. Blacklight Photography. | T&V Photography A ghost rises from the body of a dead man outlined with glowing chalk. Blacklight Photography. | T&V Photography](https://m.psecn.photoshelter.com/img-get/I00007YVujK7rPDw/s/1200/I00007YVujK7rPDw.jpg)
A ghost rises from the body of a dead man outlined with glowing chalk. Blacklight Photography. | T&V Photography
![Developing of blood stains and footprints with uv light. Invisible bloody footprint under uv light. | CanStock Developing of blood stains and footprints with uv light. Invisible bloody footprint under uv light. | CanStock](https://cdn.w600.comps.canstockphoto.com/developing-of-blood-stains-and-picture_csp42260172.jpg)
Developing of blood stains and footprints with uv light. Invisible bloody footprint under uv light. | CanStock
![Evidence On Place Of Bloody Crime Under UV Light Stock Photo, Picture And Royalty Free Image. Image 66258383. Evidence On Place Of Bloody Crime Under UV Light Stock Photo, Picture And Royalty Free Image. Image 66258383.](https://previews.123rf.com/images/couperfield/couperfield1611/couperfield161100012/66258383-der-nachweis-%C3%BCber-den-ort-der-blutigen-verbrechen-unter-uv-licht.jpg)
Evidence On Place Of Bloody Crime Under UV Light Stock Photo, Picture And Royalty Free Image. Image 66258383.
![Crime scene fingerprint highlighted on a knife blade in a forensic fluorescent powder and illuminated with a fluorescent UV light source by a CSI Stock Photo - Alamy Crime scene fingerprint highlighted on a knife blade in a forensic fluorescent powder and illuminated with a fluorescent UV light source by a CSI Stock Photo - Alamy](https://c8.alamy.com/comp/CPK6XB/crime-scene-fingerprint-highlighted-on-a-knife-blade-in-a-forensic-CPK6XB.jpg)