More than 40 robberies in the past year are being investigated by West Midlands Police.
Jordan Herring, 22, is jailed for five years following the attack in November 2022.
The man, in his 50s, was arrested at Chelmsley Wood bus station, police said.
Bobbie Goodman was 18 when she was thrown from the fourth floor of Merton House in Chelmsley Wood.
Jordan Herring, 22, is cleared of a charge of attempted murder at Birmingham Crown Court.
Jordan Herring, 22, from Solihull, denies attempted murder at Birmingham Crown Court.
Jordan Herring denies throwing his girlfriend from the fourth floor of a Chelmsley Wood tower block.
The BBC has spoken to passengers, transport staff and bus drivers about a growing national trend of antisocial behaviour on public transport.
