verhaftet
arrested
Describes the state of having been detained and taken into custody by the police.
Der Verdächtige wurde gestern Abend verhaftet.
The suspect was arrested yesterday evening.

arrested / attached
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arrested
Describes the state of having been detained and taken into custody by the police.
Der Verdächtige wurde gestern Abend verhaftet.
The suspect was arrested yesterday evening.

'Verhaftet' is the past participle of the verb 'verhaften' (to arrest). It is very often used like an adjective to describe the state of a person or a characteristic.
Der verhaftete Mann durfte einen Anwalt anrufen.
The arrested man was allowed to call a lawyer.
You can recognize the meaning from the context. If it is about the police, crimes, or laws, the literal meaning 'festgenommen' (detained/arrested) is intended. If it is about ideas, traditions, or the past, the figurative meaning 'festhalten an' (to cling to) is intended.
Der Dieb wurde auf frischer Tat verhaftet.
The thief was arrested in the act.
In the figurative meaning, 'verhaftet' is always used with the preposition 'in' and the dative. The structure is: 'in etwas (Dativ) verhaftet sein' (to be attached to/stuck in something).
Sein Denken ist noch stark dem 19. Jahrhundert verhaftet.
His thinking is still strongly attached to the 19th century.
free
'frei' and 'verhaftet' are opposites in this context. A person is 'frei' when they are not being held or locked up and can move around. A person is 'verhaftet' when the police have arrested them and they are not simply allowed to leave. The contrast is especially clear in news, police, or court contexts: either someone is free, or someone is arrested.

Am Wochenende ist der Verdächtige am Bahnhof verhaftet worden.
The suspect was arrested at the train station over the weekend.
Nach der Befragung durfte der Mann wieder frei nach Hause gehen.
After the questioning, the man was allowed to go home free again.