Met Police to extract suspects' mobile phone data
"We are looking at a possible breach of human rights law," spokeswoman Emma Draper told the BBC.
"It is illegal to indefinitely retain the DNA profiles of individuals after they are acquitted or released without charge, and the communications, photos and location data contained in most people's smartphones is at least as valuable and as personal as DNA."
Ms Draper added that while the Met's current plans were limited to fixed extraction terminals in stations, portable technology was readily available.
"Examining suspects' mobile phones after they are arrested is one thing, but if this technology was to be taken out onto the streets and used in stop-and-searches, that would be a significant and disturbing expansion of police powers."