Not Guilty Plea Entered in Attack on Sioux Falls Dentist

CANTON, S.D. (AP) — A Lincoln County judge has entered a not guilty plea on behalf of a man accused of assaulting his former dentist in a Sioux Falls parking lot.

Authorities allege 56-year-old David Yocom hit his former dentist with a car and threatened him with a hammer on Aug. 6. Authorities said the man who was assaulted did not have serious injuries and is back at work.

KELO-TV reports that Yocom faces aggravated assault and stalking charges that could land him in prison for 15 years if he's convicted.

• Sioux Falls Police: Patient Allegedly Attacks His Dentist

Authorities haven't commented on a possible motive but say Yocom has a history of mental illness. His mother, Donna Yocom, told the Argus Leader earlier that her son is a diagnosed schizophrenic.

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