Posters for Zombie (1979) and Fade to Black (1980) are seen hanging up in Rollie Tyler's apartment in several scenes. Also, the film I Dismember Mama (1972) is mentioned (referred to by its alternate title 'I Dismember Mama').
When Rollie offers Micky coffee, he corrects his name to Lipton. Rollie smiles and says 'Tea then?'. Lipton is a well known brand of Tea in England and Australia.
When Rollie moves Ellen from the floor to the bed after she has been shot, there is no blood or stain on the floor. Her injury was fatal, thus there should have been a large amount of blood on the floor.
Rollie Tyler leaves the FBI office, then in the next shot he is walking up the stairs to his apartment wearing a black sweater that he didn't have on in the previous shot.