The arrest of the three suspects in the murder of Avi Edri and the boy Nissim Sheetrit - two cases more than 30 years old - joins many breakthroughs that have been discovered in recent years in cases that are decades old.
Some of the cases deciphered are high-profile, which shocked the country when they occurred.
Such cases, such as the murders of Vardit Bekarknot and Noa Eyal, which have been solved in recent years, are examined time and time again in order to find a new thread.
Sometimes a new forensic evidence is also discovered, which modern science and technology make possible to use in ways that police investigators have not been able to imagine in the past.
Avi Edri, Photo: From "The Hidden Rabbi"
One of the causes of the wave of deceptions is a 2007 law that allows police investigators to obtain a DNA sample from suspects. Police officers can take a DNA sample suspected of drug offenses, vehicle-related offenses, sexual offenses, violent offenses and serious property offenses.
One of the first cases in which the investigators tried the DNA tests was the murder of Nava Elimelech in Bat Yam. About two years ago, the investigators also tried an innovative test, and even removed Elimelech's body from the grave, but to no avail.
The boy Nissim Sheetrit, Photo: No credit
In contrast, the murder of attorney Anat Flainer was solved in 2008 using a sample found in the gloves of a teenager arrested on suspicion of theft.
Overall, the police say that murder investigations are for the most part not like in a TV series, where within 45 minutes the murder is deciphered and the suspect prosecuted, and the police invest a lot of effort in deciphering all the murders, using overt and covert means.
The ability to decipher murders even after many years depends on the evidence accumulating before investigators, a craft that is mostly performed behind the scenes.