During the sex scene between Alex Pettyfer and April Pearson, April Pearson is not wearing a shirt. However, as Alex Pettyfer is dragged out of the car, she is suddenly wearing her shirt again.
Nearly everyone has the apparently unpopular and bullied character's phone number saved into their phones.
Detective Constable Harmison picks up an essential murder crime scene clue without gloves, thus negating any DNA or finger-print evidence. However, he is careful enough to place it carefully in an evidence bag.