A huge amount of so-called forensic “science” is dubious. Blood splatter analysis, bite mark analysis, voice print analysis, handwriting analysis, all bullshit. Even more ‘respected’ forms of forensic analysis are not slam-dunks like people, including people on juries, are convinced they are. Fingerprints can be misidentified, especially if it’s a partial print (and it’s a myth that no two are alike anyway). DNA samples can be tainted.
Basically, the entire field of forensics is built on a lot of very shaky ground and, unfortunately, has resulted in a lot of wrongful convictions. It needs to be overhauled by actual scientists.