three men were involved in a fatal shooting near rockhampton on tuesday .
greg mcnaughton , 53 , was shot dead by his son tim .
tim is also believed to have shot at his father 's friend lindsay hart .
the 24-year-old then turned the gun on himself .
mr hart escaped into bushland and phoned police .
all three had been target shooting together before the incident .
greg and lindsay were both pilots with the royal flying doctor service .
tim was an apprentice aircraft engineer with the company .
he sustained serious head injuries in a motorbike accident last year .
was visiting his parents while on leave from a rfds base in alice springs .
police are not looking for anyone else in relation to the deaths .