This is the 11817th most frequent Spanish word.
hallados
"Hallados" means "found."
Here, 'hallados' is used as an adjective, derived from the past participle of 'hallar', describing the objects that were found.
Los objetos perdidos fueron hallados en el parque.
The lost objects were found in the park.
In this sentence, 'hallados' acts as an adjective, providing more information about 'los restos' and referring to them being discovered.
Los restos hallados pertenecen a una civilización antigua.
The remains found belong to an ancient civilization.
Here, 'hallados' is part of a reduced relative clause, modifying 'los detectives' to specify those who were found.