Evn absent evidence of their credibility, an Interpol Red Notice and a foreign arrest warrant for a serious nonpolitical crime can, in the light of concessions made by the petitioner, constitute serious reason to believe that the petitioner committed the crimes referenced, and therefore a basis for shifting the presumption when applying for cancellation of immigration removal.
Even absent a formal adverse ccredibility decision, the suspicious timing of the petitioner's departure from El Salvador, and the IJ's determination of lack of specificity is sufficient evidence to establish that the petitioner did not prove by a preponderance that there wasn't serious reason to believe that he had committed the crimes.
Withholding of removal under the torture convention also sufficiently supported, given the unlikeliness of the foreign government's consent or acquiescence in any future torture.
https://cdn.ca9.uscourts.gov/datastore/opinions/2021/08/17/20-71839.pdf