Various news articles state that "In stabbing cases, perpetrators often injure themselves, said Joseph Giacolone, an adjunct professor at John Jay College of Criminal Justice and a retired NYPD sergeant.
"If you're stabbing and hit the bone, the knife kicks back, and your hand gets sliced," he said."
To me, that would exclude anyone that police have already talked with - the LE would certainly have asked to see their hands, and arms.
The crime scene where four Idaho college students were slaughtered will be grueling to process given the number of victims and amount of blood, an expert told Fox News Digital.
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