Answer: The case can still proceed with the DNA evidence.
Explanation: In the U.S, the Miranda warning is a warning given by a law enforcement officer to criminal suspects in his custody advising them of certain constitutional rights, called their Miranda rights. This is their right to silence; that is, their right to refuse to answer questions or provide information to law enforcement or other officials.
Jason confessed to the assault without receiving his Miranda warning. Although he is guilty and the DNA evidence proved him guilty as charged. The case can still be proceeded with that evidence .