two witnesses said they had heard roa sierra say he was going to serve as bodyguard for two foreigners who were going on a trip to a desolated land. one foreigner, rafael del pino, was known to have been in contact with roa sierra ninety minutes before the assassination, according to police reports. del pino was traveling with another cuban, of whom the police also felt "well-grounded suspicion" over this assassination and who was also observed in the immediate vicinity of the assassination. these two cubans immediately fled to the cuban legation just in time to avoid arrest..