Small Transport
Air Traffic Control Fully Certified
Air Traffic Control Time Certified In Pos 1 (yrs) 2
Situational Awareness; Communication Breakdown; Distraction
ATC Issue All Types; Airspace Violation All Types; Conflict NMAC; Deviation / Discrepancy - Procedural Published Material / Policy
Flight Crew Took Evasive Action; Flight Crew FLC complied w / Automation / Advisory
Procedure; Human Factors
Aircraft Z was a departure to the southwest. Aircraft X was an IFR departure initially cleared for takeoff with runway heading to protect for Aircraft Z. The incorrect squawk code on the radar tag up was a distraction. I issued a turn to heading 300 about 3 miles south of the airport and switched Aircraft X to Departure Control. I should have issued the traffic; Aircraft Z and Aircraft Y that were to the south/southwest at close to 8;000 ft. Aircraft Y was a fast VFR aircraft that was inbound but not talking to ATC and violated the Class D. Aircraft X had a TCAS/RA for the two VFR aircraft. Aircraft X also did a very slow turn to the 300 heading which further caused him to be over the VFR traffic. [My recommendation is to] give the turn earlier; when I issued the squawk code. Also; I should have issued the traffic prior to switching frequencies. I should have ensured all conflicts were resolved.
APA Tower Controller reported that they did not issue traffic advisory after a delayed heading change to avoid conflicts.