The killer was an acquaintance of the victim in 60% of solved cases, while partners or ex-partners accounted for 14% of the deaths.

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"I think missing persons are seen as an unenviable chore, " he said, because many cases are never solved.

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Not a single one of these cases has been solved.

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Over the years advances in forensic science such as fingerprint, ballistics, and especially DNA testing have allowed for many cases to be solved just by re-examining the old evidence.

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One important question is if 75% of the cases are being resolved at that moment without special education but only 19-20% of the cases were effectively solved, does this model work?

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Neither of the two cases has been solved.

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None of the cases has been solved.

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"The ability to harness the true power of social media, and focus it on a case that needs to be solved will help law enforcement close cases more quickly and bring closure to the families of victims who are still waiting for justice, " said Morgan Wright, CEO and Chief Crime Fighter of Crowd Sourced Investigations, LLC.

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We have eight homicide detectives that are now handling fifty-five murders and out of those fifty-five cases none of them are a mystery and those are cases that will all be solved.

BBC