The oldest member of Koko's crew and the second in command. A former Delta Force operator who used to be active in Somalia during the 1990s, he is a veteran mercenary with strong leadership skills. He acted as Floyd Hekmatyar's bodyguard together with Chiquita, his ex-wife, before joining Koko's squad. Lehm also does sniper work either alone or together with Lutz.
Lehm is probably the most dangerous of Koko's bodyguards along with Wilee. He was the only one to aim his weapon at Yonah when the latter threatened Koko.
His surname "Brick" was reveled in ep7 of season 2.