Tracey Vickers is accused of beating and strangling Tobias Gross.
The two victims are among at least 113 homicides in the city so far this year. St. Louis had 120 confirmed homicides in all of last year.
The death brings the city’s murder total for 2014 to 110.
Officers say the killer or killers of James Lane & Jonathan Saddler remain at large
Victim was to testify in an assault case.
William Galvin will be sentenced in November
The lawsuit alleges police responded a block away from the address given to the 911 dispatcher who took the assault-in-progress emergency call.
A man already serving life sentences for each of six summertime 2008 killings in Illinois next will face trial in Missouri on charges he killed an Arkansas couple during the spree.
Police say Jared Elam was gunned down, Thursday night, in the 4200 block of Obear.
St. Louis police say a suspect opened fire on three men just after midnight at Barrett Brothers Park at St. Louis Avenue and Goodfellow.