DNA can be a vital tool for the CPS in criminal prosecutions, but the defence should bear in mind that this evidence is based on scientific opinion rather than fact and only forms part of the case against the defendant, says Julian Young
Experts can prove invaluable in fraud cases, but practitioners must give them clear instructions and ensure they don't stray from their role, says Stuart Cakebread
Doctors will be protected from suit for evidence they give in court as medical experts, but not where they have acted as advisers outside court. But is this distinction still appropriate, ask William Featherby QC and Henry Charles
Determining whether symptoms have been caused by chemical exposure is a complex question for toxicologists. Laura Robinson explains what information practitioners need to provide to get the most out of their expert
While forensic accountants often work on high-profile fraud investigations, their skills can also be used in a wide range of civil actions, say James Stanbury and Mark Jennings
Hair analysis is reliable and cost-effective, and can provide vital evidence in a range of cases, but it is important that it is done correctly by the right experts, says Matthew Taylor
Expert witnesses are protected from being sued for anything they say in court, but a recent case could bring an end to this immunity, say Mark Solon and Julia Roffey
