Complex sentence: As well, she was suspected in the 1980 death of her boyfriend Gerald Dossett: after her arrest, Dossett's body was exhumed and analysed for signs of arsenic poisoning.
Split into simpler sentences: As well, she was suspected in the 1980 death of her boyfriend Gerald Dossett. After her arrest, Dossett's body was exhumed and analysed for signs of arsenic poisoning.