ST. CLOUD -- A St. Cloud man has again been ruled incompetent to stand trial in the murder of his mother.

A fourth mental competency exam on Dean Friese has determined the 54-year-old is not well enough to stand trial in the slaying of Lois Omeara. A Stearns County judge adopted an examiner's findings of incompetency today (Tuesday).

Friese had most recently been ruled well enough to stand trial last September, but a February exam has now found he is incompetent.

Friese is accused of stabbing his 72-year-old mother multiple times in September 2013 at his apartment on 33rd Avenue North. He is charged with first and second-degree murder in the case.

According to the criminal complaint, Friese pulled the medical alarm in his apartment, knowing his mother would respond. He then told investigators he grabbed a large kitchen knife and stabbed her when she entered the apartment.

Omeara was pronounced dead at the scene with multiple stab wounds to her chest.