Sevdet Besim pleaded guilty to planning a terrorist act.

"...The AFP argued during a 10-day hearing, which concluded earlier this month, the tracking device was "by far the single most important control" in reducing the risk of a terrorist act.

Read more: http://www.smh.com.au/victoria/tracking-device-removed-from-former-anzac-day-terror-plot-accused-harun-causevic-20160708-gq1m7l.html#ixzz4DnmauiaL