When Stargate Command broke into the Trust's location Weaver was captured and sent to the S.G.C. for questioning. Teal'c's persuasive techniques were able to convince Weaver to divulge everything he knew -- but this still wasn't enough to help SG-1 locate and rescue Vala..
Memento Mori - Weaver is captured by S.G.C. personnel and convinced to divulge all information regarding Athena and her bone with Vala.