Two Historic Deaths I Just Found

When researching the January 12, 1900, abortion death of Ida Henry, at the hands of Dr. Paulina Bechtel, I found two more deaths attributed to Bechtel. 

I had known that she had been tried in the October 3, 1895 abortion death of Mrs. Kittie Bassett, and implicated in the 1900 death of Barbara Shelgrenand the 1911 death of Mary Thorning. 

The two other deaths attributed to Dr. Bechtel are Carrie Marskl, who died in September of 1904 and Mary Orning, who died in December of 1911.

I've been unable to determine why Bechtel wasn't incarcerated after these deaths.