Speaking outside court, Crown Prosecution Service lawyer Greg McGill said, "DCI Casburn has been found guilty of misconduct in public office - not only did she seek to divulge confidential information, she sought to leak details of a case to the very newspaper under investigation".
"This is a very serious offence and the jury has today agreed that DCI Casburn's actions were criminal", he added.
More top news
Paracetamol is ineffective at treating back pain, Australian researchers say.
Madonna says she still cannot bring herself to watch footage of the moment she fell on stage while performing at the Brit Awards.
Ed Miliband has pledged to give zero-hours workers the right to convert their contract into a regular job after three months.