Tuesday, June 15, 1999 Published at 21:44 GMT 22:44 UK
Dando murder will be solved - police
The killer left little forensic evidence at the scene of the crime
The BBC's Crimewatch UK programme has broadcast another appeal in an attempt to find the murderer of television presenter Jill Dando, 50 days after she was killed.
Last month Crimewatch showed an extensive reconstruction of Ms Dando's murder on 26 April in an attempt to jog memories.
Mr Ross told viewers on Tuesday: "I was pessimistic after last month's programme.
Brother is confident
Ms Dando's brother Nigel has said he remains confident that the person who shot Ms Dando in the head outside her home in Fulham, west London, will be found.
"We're not at all despondent," he said. "I know it's been quite a long time, but we know the police have been working flat out on this inquiry, and that they've still got a mountain of information to sift through."
The attack on 26 April shocked the nation and seven weeks later obvious motives remain just as elusive.
A £150,000 reward has failed to penetrate the wall of silence surrounding the killer or killers. But senior officers are adamant the inquiry team is not being wound down.
They are working on two main theories:
Over the last seven weeks detectives have been studying her lifestyle and interviewing former boyfriends and colleagues. Her brother is appealing to anyone who may be shielding the murderer to come forward.
Suggestions that the killer may have been a Serbian agent acting in revenge for the bombing of a Belgrade TV station appear to have been ruled out by the police.
The BBC's Crime Correspondent Stephen Cape says there are problems with the "celebrity stalker" theory.
Firstly, it would be completely unprecedented.
However, former senior detective John Jones believes the killer is obsessed and proud of killing Ms Dando. Soon he will want to tell somebody about his "dark secret".
"By committing this murder in such a public way he was really advertising his feelings," he said. "And he will want to continue advertising his feelings.
"He will know that although at the moment the media is extremely interested in this crime, as time goes by the interest will die. He isn't going to want that to happen."
Meanwhile, police are believed to be honing in on the idea that someone hired a hitman to eliminate Ms Dando for some, as yet unfathomable, personal or professional reason.