Hundreds of people across Wales are sent behind bars every year and, over the years, many of the most evil killers in the country have been sentenced for brutal murders.
Some of the most gruesome murders in Wales were committed in, or by individuals from, Cardiff. Many of these killers have now been brought to justice and are serving lengthy prison sentences - with some set to spend the rest of their lives in jail.
However, some of these convicted murderers could one day be released back into the community. When criminals are convicted of murder, they are sentenced to life imprisonment with a minimum term.
