Yes if there is evidence that is admissable IN AN AUSTRALIAN COURT a person maybe charged - I DID NOT STATE THEY WOULD NOT
BUT YAK
The health of the accused especially if they are 90 years old is taken into account if that person should face a trial or in this case be extraditied. If the pressures of the trial are likely to put the persons life at risk or their age and or health means they can not properly defend themselves.
FACT AGAIN YAK
Unlikely your reality void world where hate filled low lifes can just put a bullet in a 90 year olds head based solely on accusations.
Not surprising you would want to do this though Yak , a 90 year is the only person you would have the b@lls to go after