。
Those who came were all caught.
Literal
Come-[attributive-た] ones [topic-は] all were-caught.
Note 来たもの uses 者 (formal 'person') in a plain-form relative clause. 皆 ('all / everyone') is read みな here (can also be みんな). 捕まる is the intransitive 'be caught / get caught,' where the catching happens to the subject — no overt agent. Passive-like without explicit passive morphology.