It appears that DNA has a selective prioritization in the solving of certain crimes. Murders are the number one priority (cost average cost/case =$1394.00). DNA is utilized in burglary investigations also, with a witness to DNA ratio of 1/3 for convictions.
This poses two questions. What if someone's DNA was planted? and 2. what if the accused was unable to afford another confirmatory test or was unable to prove that they were not there at the crime scene?
Whichever is the case DNA testing appears to be a field to train in for jobs. It aint goin' no where!
Both based on USA today articles