The family of slain Briton Lindsay Ann Hawker expressed discontent with police Tuesday over the stalled hunt for Tatsuya Ichihashi, the prime suspect in her 2007 murder.

"We may as well call (Ichihashi) an invisible man because he is invisible to police," the victim's father, Bill Hawker, said angrily at a news conference at the British Embassy in Tokyo.

The Chiba Prefectural Police briefed the family — Hawker, his wife, Julia, and two daughters, Louise and Lisa — on Monday. But at the briefing, the family learned "Japanese police are no closer today to (apprehending Ichihashi) than they were when he slipped through their fingers two years ago," Bill Hawker said.