It is very certain that he knows about his death.

And I wasn't entirely convinced she hadn't known about his death to begin with.

She knew about his wife's death from cancer several years ago, and guessed that perhaps a part of him had died with her.

But what more is there to know about his death?

Many students did not know about her death until they arrived at school.

At least one report claimed that "Not much more is known about his death".

We wanted to make certain that the girl knew about her mother's death.

The major didn't know anything more about his brother's death.

Nothing more is known about this person and his death.

We know more about her death than we did before.