More than 300 young girls and women have been killed in Ciudad Juarez since 1993 on the other side of the US border, across from El Paso, Texas. Late November, over 1,000 women dressed in black and holding candles marched through Mexico City to demand that those responsible for killing hundreds of women in the border town of Ciudad Juarez be brought to justice. Despite several federal and state investigations, the authorities have been unable to identify the killers or establish a motive behind the murders. Several people have been arrested or detained, but still the killings continue. Various motives have been offered: satanic black magic rituals, drug related and sex slavery.