The sentence "He was announced dead" is correct and usable in written English. You can use it when describing a situation in which someone was officially declared dead. For example, "The police were sent to the scene after he was announced dead.".
In the early morning of 18 December 2006, al-Jamri was rushed by ambulance from his home to Salmaniya Medical Complex, where he was announced dead.
Around 6 45 a.m., after the Tripathis had received hundreds of threatening and anti-Islamic messages (though they are not Muslim) and after Suspect No. 1 was announced dead from injuries sustained at the shootout in Watertown, Mass., The Associated Press revealed the full name of Suspect No. 2: Dzhokhar Tsarnaev.
Panic struck "30 Rock" fans when Kim Jong Il was announced dead on Dec. 18, but how is the writers' room coping?
One of the victims of the Redwood fire, 17-year-old Kressa Shepherd, was announced dead on Monday after spending weeks in treatment for burns she sustained attempting to escape the blaze. .
Later in the year, I thought of Crace with sadness when the shortlist was announced and Being Dead wasn't on it.
Unfortunately, the first photograph sent back when the contract was announced was of a dead dog on the rubbish-strewn beach opposite the hotel.
I remember my parents telling me how, on the day it was announced that Hitler was dead, there was no rejoicing in the streets, just private relief and satisfaction.
Since I tried Ludwig back in 2017, I have been constantly using it in both editing and translation. Ever since, I suggest it to my translators at ProSciEditing.
Justyna Jupowicz-Kozak
CEO of Professional Science Editing for Scientists @ prosciediting.com