Cold case refers to a crime or an accident that has not yet been solved to the full and is not the subject of a recent , but for which new information could emerge from new witness testimony, re-examined archives, retained material evidence, as well as fresh activities of the suspect (e.g. repeated deaths of wives of a suspect, who marries a lady and then does away with her for insurance gain). New technical methods developed after the case can be used on the surviving evidence to re-analyze the causes, often with conclusive results.

[] Characteristics of a criminal cold case

[] Violent or major crime

Typically, cold cases are or other major crimes, such as or which unlike unsolved minor crimes are generally not subject to a .

Sometimes disappearances can also be considered cold cases if the victim has been not seen or heard from for some time, such as the case of .

In about 35% of those cases are not really cold cases at all. Some cases become instantly cold when a seeming closed (solved) case is re-opened due to the discovery of new evidence pointing away from the original suspect(s). This happens in a surprising number of cases, and is the result of a . Other cases are cold when the crime, usually through discovery of human remains, is discovered well after the fact. Other cases are classified cold cases when a case that had been originally ruled an accident or suicide is re-designated a murder when new evidence emerges.

The murders is a classic case, when was wrongly executed for the alleged murders of his wife and child. Many other bodies were later found in the house where they lived with Christie, and he in turn was executed for those crimes. The case helped a campaign against in Britain.Moncler Frakker 

[] Identifying a suspect

A case is considered unsolved until a has been identified, , and for the crime. A case that goes to trial and does not result in a can also be kept on the books pending new .Outlet Moncler 

Often a case is not solved but forensic evidence helps to determine that the crimes are . The case and (still unsolved) cases are such examples.

[] Notable examples

[] Tunnel vision

Sometimes a viable suspect has been overlooked or simply ignored due to then-flimsy circumstantial evidence, the presence of a likelier suspect (who is later proven to be innocent), or a tendency of investigators to zero in on someone else to the exclusion of other possibilities (which goes back to the likelier suspect angle) -- known as "tunnel vision":moncler ned jakker 

[] Improvements in forensics

With the advent and improving and other technology, many cold cases are being re-opened and . departments are opening cold case units whose job is to re-examine cold case files. DNA evidence helps in such cases but as in the case of fingerprints, it is of no value unless there is evidence on file to compare it to.

[] Famous criminal examples

The identity of is a notorious example of an outstanding cold case, with numerous as to the identity of the . Similarly, the has been studied extensively for 40 years with numerous suspects discussed and debated. The perpetrators of the of 1920 have never been positively identified, though the , a group of , are widely believed to have planned the explosion. The in 1933 remains controversial and although was tried, convicted and executed for , it is possible that the Reichstag fire was perpetrated by the to enhance their power and destroy democracy in Germany.

[] Famous disasters

Many disasters and accidents remain obscure, especially involving major fires, where any evidence of how they started is destroyed by the fire itself. They include the of 1987 and the of 1985 in Britain. The causes of many early are often obscure although they can sometimes be inferred from later research, such as the of 1842 and the of 1879. The French disaster was one of the first major rail accidents and caused the deaths of at least 55 passengers when two locomotives derailed and the carriages piled into them and one another. They were then set on fire by coals from the engine, and passengers could not escape because the carriage doors were locked.

The first Tay rail bridge collapsed in a storm on the evening of December 28, 1879, and an entire express train fell into the river below the bridge. It is still one of the worst in Britain. It is likely that in critical components contributed and the parts broke suddenly, precipitating disaster. Many key joints were also loosened by the vibrations of trains passing overhead. The in 1880 concluded that the bridge was "badly designed, badly built and badly maintained".

The wheel axles were the weak link on the Versailles locomotive, and the lugs holding the tie bars on the Tay bridge. The same fatigue theory may explain the of 1919, when a large storage tank suddenly failed, releasing a wave of onto the dockside in . It killed 21 people, including a fire fighter from an adjacent firehouse.Moncler Mnd Frakker

The loss of the has also been revisited following the discovery of the remains of the ship at the bottom of the . Modern analysis of the appears to show that the rivets used to fasten the steel sheet of the were weaker than expected. When the ship received a glancing blow from the iceberg, they failed sequentially and allowed seawater to pour through the gaps between the plates of the hull.Moncler Jakker