the second time, the circumstances of his arrest the first time are pretty muddled. Was he tried in a secret military court? There is no mention of evidence in either the prior of current case. One of the charges was being a member of an "un-named" organization. Is it a secret as to which organizations are illegal? What is "being a threat" to Israeli security? Disagreeing with the occupation? Saying you do? Trying to convince others? All in all, a pretty dodgy system.
Palestinians report IDF airstrikes on Islamic Jihad targets in southern Gaza Strip (Haaretz)
from the article: IDF arrests Palestinian prisoner released in Shalit swap