But by your definition it's not science.
It is historical science, but not origin science. For a start, the present evidence is observable, and can be closely examined. If it is human hair, which is often the case, then it can be tested for DNA and if the offender is on the DNA register, he can be traced. If finger prints are found, they can be examined and compared with finger prints of people on record and if a match is found, the criminal can also be traced. There can be tyre tracks, foot prints, blood stains, witness sightings, and all sorts of evidence that can be examined, and tested for verification. Through the evidence at the scene, the crime can be replicated in the sense that the investigators can know what actually happened.
There are some cases that are not solved for many years, but another vital piece of evidence can be uncovered through a witness coming forward that would give the investigators a lead and finally to crack the case.
But origin science is not a true science in the same manner as historical science, because there is no observation, no examination, no test, and no replication of the evolutionary process. With forensic science, the case is reconstructed through the evidence and not evidence proving a preconceived premise. And when there have been cases where there has been a preconceived premise, and a person is convicted of a crime, it has been subsequently discovered through further evidence that the preconceived premise was wrong and a miscarriage of justice had occurred.
Evolution, as well as creationism, looks at the same evidence. Creationism draws conclusions from the available evidence. Evolution fits the evidence into its own preconceived premise. That is the big difference between how the two interpret the available present evidence.
So Evolutionists come up with the theory about how the universe originated, and they fit the evidence into their theory, and either ignore or explain away any evidence that doesn't fit. Creationists view the evidence and allows the evidence itself to prove that the Bible is an accurate historical record of what actually happened.