What type of details about john patler can be gathered from the following bio? Bio: john patler -lrb- born january 6 , 1938 -rrb- is an american former neo-nazi who was convicted of assassinating american nazi party leader george lincoln rockwell on august 25 , 1967 . patler was born john c. patsalos in new york city to greek parents . when patler was five , his mother was shot and killed by his father , who was sent to sing sing prison . he changed his name to patler in 1960 . patler served in the u.s. marine corps from 1958 to 1960 , when he was discharged honorably on grounds of '' unsuitability '' after being arrested at a nazi party rally . patler had been a captain in the american nazi party and the editor and cartoonist for the party 's magazine , '' stormtrooper '' . however , he was expelled from the party in march 1967 for alleged '' bolshevik leanings '' after disagreeing with rockwell about some of the party 's policies . on august 25 , 1967 , george lincoln rockwell was shot and killed while getting into his car , which was parked in front of a self-service laundry at an arlington , virginia , shopping center . the weapon used in rockwell 's killing was a 7.63 mm broomhandle mauser pistol . patler was arrested half an hour later about a mile from the scene of the shooting . patler was convicted of first-degree murder on december 16 , 1967 by an arlington jury and subsequently sentenced to 20 years in prison by arlington circuit court judge charles russell . patler was paroled from prison in 1975 , after having served eight years of his sentence . after later violating his parole , he received an additional six-year sentence .
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