Story highlights Suspected killer was Delta State professor who asked for reduced class load due to medical issues

Delta State University professor Ethan Schmidt was shot in the head

(CNN) At some point during the intense daylong manhunt to apprehend him, Shannon Lamb spoke with police and told them he wasn't going to go to jail.

When officers finally caught up to him late Monday, he made good on his threat, police said: He pulled out a gun and killed himself.

Lamb was the suspect in two killings: that of Ethan Schmidt, who was shot in the head in his office on the campus of Delta State University in Cleveland, Mississippi, and of Amy Prentiss, who was found shot to death at a home in Gautier, a coastal city about 300 miles away from the university.

Police say Shannon Lamb is a suspect in two homicides.

A candlelight vigil is scheduled Tuesday evening at Delta State to remember Schmidt.

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