Simplify the following text for a Grade 8 native English-speaking person.
Original: On April 22 , 2007 , Bishara resigned from the Knesset via the Israeli Embassy in Cairo , following a police investigation into his foreign contacts , and accusations of aiding the enemy during wartime , passing information on to the enemy and contacts with a foreign agent , as well as laundering money received from foreign sources .
Simplified: On April 22 , 2007 , Bishara resigned from the Knesset at the Israeli Embassy in Cairo , Egypt . He did this after a police investigation of foreign people he knew and talk with .