As it turned out, the Heroina was allowed safe passage by its interceptors and one can only conclude there to have been bribery or collusion in play. How else could a schooner with over three hundred enslaved persons in the hold have been allowed to escape the dragnet by a squadron patrol? Indeed, the annals of history on illicit slave trade voyages after 1809, when the Abolition of the Slave Trade Act passed by the British parliament in 1807 came into effect, are replete with cases of commissions of inquiry into accusations made and charges of underhand dealings brought by competitors against Portuguese, Spanish, Brazilian, French, American and British carriers (Asiegbu, 1969; Sherwood, 2007, pp. 21-22).  
The next we learn of the Heroina concerns its shipwreck, on the 40th day of the crossing, on the reefs off Rocky Key, now Rocky Point, on the south-central coast of Jamaica. The ship's navigational gear had gone awry, as it should have been rounding the west coast of Jamaica and bearing north towards Havana, on the north-west coast of Cuba. The wreck happened in the middle of the night and the Heroina broke in two;  
[T]he front half with most of the slaves was torn away by the waves [and] the masts broke off [...] [T]he three girls came onto the deck [and] saw the front half of the ship drifting on the waves, covered with wretched people; the slaves screamed and wailed, the captain cried, the sailors ate and drank - until daybreak. [...] [The girls and the mulatto woman] clung to the captain, who took care of them while wave after wave broke over them.
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At daybreak the sailors bound two masts together and put the girls on them. One sailor sat in front, the other behind, and thus they rowed to the bank. Those who could swim got into the water, but the others, some on boards and some on that which was left of the ship, escaped onto the shore; of course not everyone, for many were washed away (Johannes Zimmermann, in his letter of 18 November 1852).