Matt Allwright looks into the work of fraud investigators determined to catch those who steal from the public purse. And he meets the genuine claimants who deserve government help. Matt meets the fraud investigators who are on the trail of one woman who they believe is using various identities to work illegally in the UK as a nurse and claim benefits to the tune of £180,000. And one mother reveals how she reached breaking point trying to bring up her autistic son - but can she get the help she needs to allow him to live as independently as possible?