Complex sentence: In September 2011, Aamer's lawyer Brent Mickum who saw him in Guantánamo alleges that Aamer was repeatedly beaten before their meetings and that Aamer's mental and physical health is deteriorating.
Split into simpler sentences: In September 2011, Aamer's lawyer Brent Mickum, who saw him in Guantánamo, alleges that Aamer was repeatedly beaten before their meetings. He said that Aamer's mental and physical health is deteriorating.