Updated

The death of former White House press secretary James Brady has been ruled a homicide, but legal experts say bringing a case against his shooter, John Hinckley Jr., would prove difficult.

District of Columbia police say an autopsy states the cause of Brady's death Monday at age 73 to be the gunshot wound to the head he suffered in 1981 during an assassination attempt on Ronald Reagan and its health consequences

Federal prosecutors say they are reviewing the ruling.

Hinckley's long-time attorney Barry Levine tells The Associated Press that bringing new charges against his 59-year-old client seems unlikely.

Tung Yin, a law professor from Lewis & Clark Law School in Portland, Oregon, says it's rare the act that could be considered the cause of a murder occurred so long ago.