Recently New England Patriot's tight end Aaron Hernandez's name has been in the news regarding a criminal investigation. According to news reports, a number of search warrants have been served at his residence in Massachusetts related to the death of a man not far from Hernandez's home. ABC News reported that police wanted to know why house cleaners had been hired recently to Hernandez's home. Stating the obvious, as of yet Mr. Hernandez has not been charged with a crime related to this investigation and should be considered innocent until proven otherwise in a court of law. News agencies have also been known to get information wrong. My comment here is only on a possible investigation step by the police related to the alleged aspect of having a professional service clean a house, supposedly after a crime might have occurred in it.
First off, the police would most likely interview the owners of the cleaning service and the actual workers who cleaned the location. Questions would probably include things like when were you hired, who hired you, what directions were you given, were there specific instructions regarding any problem areas at the location. They would also be questioned as to what, if any, odd or suspicious things did they encounter in the location. Regarding any possible blood stains at a location or in a vehicle, even after a thorough cleaning, blood stains oftentimes can still be found. Blood stains can spatter and still be found on clothing, shoes, etc. Forensic investigators can utilize chemical sprays that can reveal blood stains invisible to the naked eye. The bottom line is that blood stain evidence can still be recovered even after someone tries to destroy it.
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