How to identify WES source tissue (blood vs. other)

Question

[gernophil]

I have some fastq files from WES, but unfortunately, the sample annotation isn't that good. I need samples that are from blood and not some other "normal" tissue so I was thinking about using tools like TCRbiter to identify samples with VDJ rearrangement in the TCRs and BCR, but so far I haven't had much success. Does anyone have a robust workflow or a different idea to do this?

[Pierre Lindenbaum]

comment or/and validate all your previous questions please.

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[gernophil]

Sorry, for most of the questions I upvoted the correct answer, but did not accept it. The missing ones I will check later.