Answer:
It is up to Peters to decide whether to disclose his belief about the affiliation of the strangers to others. However, this decision could affect the level of trust he has built with the community and could potentially lead to more harm if he is wrong about the affiliation of the strangers.
Peters may consider attempting to find out why he was sought out, as this could give him a better understanding of the situation and help him make informed decisions about his safety and the safety of those he is working with.
Peters may consider trying to dissuade frightened individuals from withdrawing from his study, as this could have a negative impact on the community and his research. He could try to calm the situation by providing accurate information and addressing any concerns they may have.
Peters may consider taking action to prevent rumored and potentially real recrimination against his cooperating families, such as ensuring that they have access to support and protection.
Peters may choose to terminate his research if he feels that it poses a risk to himself or to the people he is working with. This decision would depend on his assessment of the situation and his personal comfort level with continuing his work.