The Crown has decided it will not appeal the acquittal of Cory Armishaw in the death of a nearly three-month-old Guelph infant.

The 26-year-old was found not guilty of second degree murder in September in connection with the death of his former girlfriend's son.

The judge in the case ruled Armishaw's rights were violated and a confession made to police was involuntary and should be excluded.

OPP Det. Sgt. Jim Smyth, who obtained the confession from Armishaw, has also been praised for getting a confession from convicted killer Russell Williams.

He was also the officer you discovered the body of eight-year-old Tori Stafford in a wooded area near Mount Forest.

Prosecutors had 30 days to decide if they would appeal the decision.

No other arrests have been made in the Guelph infant's death.