The brother of figure skater Nancy Kerrigan is now charged with manslaughter in the death of their father. Mark Kerrigan was indicted Thursday in Massachusetts. He had already been charged with assault.
Prosecutors say Kerrigan attacked his 70-year-old father during an argument over the use of a telephone in January.
"We allege that the defendant's violent reckless actions and complete disregard for his father's safety and well-being endangered Daniel Kerrigan's life and resulted in the substantial harm that led to his untimely death," District Attorney Gerry Leone said in announcing the indictment.
"This defendant should have known that the cruel acts that he committed against his elderly father, including grabbing him by the neck with enough force to cause a fracture, were highly likely to result in substantial harm and endanger his father's life," Leone said.
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The medical examiner said the cause of death was "cardiac dysrhythmia," which is a loss or interruption of a normal heartbeat that can lead to cardiac arrest. The report said there was evidence of neck compression that damaged his windpipe.
The family has said publicly that they do not blame Kerrigan for his father's death. They say the elder Kerrigan had a heart condition, which the medical examiner confirmed.
Kerrigan has been free on bail, living with his mother in the house where the alleged attack occured.