No, it would not be guaranteed.
Junelle's offense is serious enough she probably was fingerprinted, but if she completed her probation, the prints might not have been kept. Some US states partially purge your record after you successfully complete probation, especially if you're young.
In 1999, the technology allowed for coding and uploading prints, but different LE agencies varied in how much they used the system, and it could be quite expensive. Unless they thought she might have committed crimes in other jurisdictions, they might only have a paper card kept locally, and that might have been destroyed either from age or by accident (mildew, insects, flood, fire...)
In many states (Massachusetts is one), local LE didn't upload directly to CODIS. Instead they uploaded to a state system which in turn uploaded to the national system. Again, often only cases that were thought to have an out of state connection were uploaded.
In the old CODIS system, you had to have ten clear prints for a match. If even one was missing or unclear, it wouldn't match. The new system only needs one print, but it codes differently and I don't know whether there is any automatic conversion.
If there was a match, it would be a definite answer. But no match might just mean not enough information.
If they definitely have Junelle's prints and they were uploaded recently, it probably would have been a match, though.
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