A bomb exploded at the 1996 Olympic Games in Atlanta, Georgia, killing one and wounding more than 100. The FBI conducted an investigation and within days, Richard Jewell was identified as a suspect. After several months, the Justice Department announced that Jewell was no longer a suspect. Jewell was publicly scorned, and followed incessantly by the media and law enforcement for the three months that he was believed to be the bomber. Evidence in the case was interpreted in such a way as to support the idea that Jewell was guilty. For example, Jewell was known to have seen the bag containing the bomb before it detonated, and moved people from the area. This life- saving act was seen as evidence that he was the bomber, because the investigators believed that he had planted the bomb in order to be able to be seen as a hero for saving people. The tendency to ignore contrary evidence or overstate existing evidence when investigators believe they have identified the guilty party is a likely practice of:

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answer:   migrations were important in the neolithic period. "two major migrations passing through southeastern europe were confirmed by the means of archaeo-genetic studies."

the first migration was the early neolithic period -- 6,000 before common era (bce) -- when the first farmers, from anatolia -- asia minor -- spread through europe. the second migration occurred during the early bronze age (3,000-2,500 bce) when the so-called "steppe population," from the eurasian steppe, replaced much of northern europe's previous population.

the first farmers of northern and western europe passed through southeastern europe with limited hunter-gatherer genetic admixture, which occurs when two or more previously isolated populations begin interbreeding. however, some groups that remained mixed extensively -- without the male-biased, hunter-gatherer admixture that prevailed later in the north and west, according to latest discoveries. southeastern europe continued to be a nexus between east and west, with intermittent genetic contact with the steppe people up to 2,000 years before the migrations that replaced much of northern europe's population.

"in some places, hunter-gatherers and incoming farmers seem to have mixed very quickly," says iain mathieson, a geneticist at the university of pennsylvania, who was first author of the paper. "but, mostly, the two groups remained isolated, at least for the first few hundred years. these hunter-gatherers had been living there for thousands of years, and it must have been quite a shock to have these new people show up -- with a completely different lifestyle and appearance."

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to control offices

this sparked alotof controversy more over ending the articles of federation