Helicopter
Flight Crew Commercial; Flight Crew Flight Instructor; Flight Crew Instrument; Flight Crew Multiengine
Flight Crew Last 90 Days 20; Flight Crew Total 7500; Flight Crew Type 5500
Situational Awareness; Distraction; Communication Breakdown
Airspace Violation All Types; Conflict NMAC; Deviation / Discrepancy - Procedural FAR
Flight Crew Requested ATC Assistance / Clarification; General Police / Security Involved
Procedure; Human Factors; Airspace Structure; Environment - Non Weather Related
I was flying approaching the LA Coliseum; East to West. I had a TCAD alert that an aircraft was approaching me from the North and behind my position (from inside the Dodger Stadium TFR). I gave a position report and did not hear a reply on the common LA basin frequency of 123.02. I checked in with LAX Helicopters and asked if the helicopter had checked in with them. I was told no. I was at an altitude of 700 to 800 feet MSL. I continued West bound and observed the other traffic fly directly underneath me; approximately 100 to 200 feet below me; putting the other aircraft; [aircraft Y;] at about 300 to 400 feet AGL.The other aircraft continued to increase speed and went westbound along the 10 FREEWAY. I contacted another helicopter [aircraft Z] to intercept in order to get a tail number. That helicopter followed the aircraft to a nearby Airport where it landed. That Tower provided the aircraft tail number and advised about its origin airport.
A helicopter near the LA Coliseum reported a near miss with another helicopter at 700 feet after that helicopter violated the Dodger TFR then proceeded to land at a nearby airport.