Grandma is showing dna matches with four “1st cousins” who are all supposedly first cousins themselves. The matches are 1211, 1175, 1138, and 904 cms. There is also a match of 972 who is a brother to the 1211 match. We have reason to suspect that one of these matches is somehow a half sibling. Not sure how to proceed. Three of them being that high seem suspect.
Thoughts or suggestions?