Rochester police say the recent spike in gun violence is not random.
Police Chief La'Ron Singletary is asking citizens to come forward with information that will solve recent gun crimes.
There have been four homicides in the city this week, bringing the total for the year to 19.
Meantime, a woman has pleaded not guilty in one of the deadly shootings.
Martha Jones is charged with murder in the death of Micah Welch on Brookdale Avenue, in the 19th Ward.