It may be possible to confirm family relationships by comparing test results with Channel or other carriers of her ancestors' mitochondrial DNA.
Mitochondrial DNA test-takers in the direct maternal line:
Channel (Brown) Blunt:
AncestryDNA Maternal Lineage (discontinued) HVR1 and HVR2, haplogroup L, Ancestry member channelreni
It is likely that these autosomal DNA test-takers will share some percentage of DNA with Channel: