Karen Read says she will not testify in her murder retrial in Massachusetts.  Read made the comments to reporters yesterday after leaving the courthouse. 

A biochemist, who is likely the defense's last witness, took the stand late Tuesday and will resume testimony this morning. 

The defense is working to prove that Read is being framed by police for the death of John O'Keefe.  Read is accused of hitting her Boston cop boyfriend with her SUV and leaving him to die in a snowstorm in 2022.