For an excellent overview of this story I recommend this critique of the paper from the English NHS's excellent Behind the Headlines service. Unlike a newspaper it will tell you who did the study, how it was funded, where the data came from and whether the results are worth anything. In this case the data was severaly limited and had put people into either "eating sweets every day" or "not eating sweets" which is very coarse categorising.It also doesn't report the absolute number of children who went on to become adult offenders. In conclusion

"Overall, this study on its own does not provide strong enough evidence to guide childhood dietary advice, although common sense says that eating too many sweets is probably not good for children. Before the newspapersâ(TM) explanation for a link can be believed there must be studies specifically designed to investigate the issue from the outset."