Tracy Robertson is accused of killing 62-year-old Otis Lee Jackson.
Watts was arrested May 15, hours after Anita Jo Grace of Olive Branch and Nita Jo Smith of Wickliffe, Kentucky, were found stabbed at Cairo’s First National Bank.
Prosecutors have ruled that a southwest Missouri man was justified when he stabbed his brother to death during an argument.
Police say the two got into a fight in an apartment in the 3100 block of Clay.
The assaults took place within a five-mile area late Monday and early Tuesday.
Nineteen-year-old Thearon Maxey was found lying unconscious on the front porch of a home in the 3100 block of Clay.
A homeless man was stabbed to death outside the central library in downtown St. Louis yesterday morning after an altercation, across the street from Christ Church Episcopal Cathedral.
Police believe they know who stabbed a man to death outside the main library in downtown St. Louis late this morning, but they haven’t found him yet.
25-year-old John Cole had earlier been convicted in the July 2012 attack that resulted in the death of Le’Nea Cole.
St. Louis police say Sorento, Ill. man killed on Laclede’s Landing Blvd, early Sunday.