Sinwar was released as one of more than 1,000 Palestinian prisoners who were swapped in 2011 for a single Israel soldier, Gilad Shalit.
Wow! 1,027murderous Palestinian prisoners for One Israeli soldier
Ref: Wikipedia
Corporal Gilad Shalit
Shalit born 28 August 1986 is a former MIA soldier of the Israel Defense Forces (IDF) who, on 25 June 2006 was captured by Palestinian militants in a cross-border raid via tunnels near the Israeli border
Hamas held Shalit captive for over five years until his release on 18 October 2011 as part of a prisoner exchange deal
Shalit held the rank of Corporal in the IDF's Armor Corps at the time of his capture and Shalit was subsequently promoted to Staff Sergeant and Sergeant First Class just before his release
Shalit holds dual Israeli and French citizenship, the latter via his grandmother
Shalit was eventually released in a negotiated agreement, securing his freedom after more than five years in isolation and captivity
In exchange 1,027 Palestinian prisoners were released, some of whom were convicted of multiple murders and carrying out attacks against Israeli civilians
According to Israeli government sources, these released prisoners were collectively responsible for 569 Israeli deaths