Timberland McKneely, Gary Garcia Jr. and Joseivan Mendoza, all pleaded not guilty to murder charges on Monday for a shooting spree that left four people dead and two wounded in February.

Gary Garcia Jr., 42, and Timberland Wayne McKneely, 20, are each facing four counts of murder and two counts of attempted murder. Homicide detectives believe a third suspect may be at large.

Gary Garcia Jr., 42, and Timberland McKneely, 20, were arrested and charged with murder last week for the random and deadly rampage on Feb. 11 and 12 that left 14-year-old Javier Pedraza Jr,.