A Chicago man has become the second person this year to file a lawsuit against Facebook over biometric data.Plaintiff Nimesh Patel claimed in a suit filed on 14 May that Facebook's tag feature is in violation of of the Illinois Biometric Information Privacy Act (BIPA).Patel says that the social media giant has not obtained written consent for this data, or failed to inform their users how long this particular information would be stored or used, reported TopClassActions.com.”Plaintiff brings this class action to put an end to Facebook's latest privacy abuse – its collection, storage, and subsequent use of its users' biometric identifiers and biometric information without informed consent, in direct contravention of the BIPA.”Facebook introduced their “tag suggestion” feature in 2010, which link to a user's profile through images with a tag.Patel's suit states: “Biometric information is any information captured, converted, stored or shared based on a person's biometric identifier used to identify an individual. A 'biometric identifier' is any personal feature that is unique to an individual, including fingerprints, iris scans, DNA, 'face geometry' (also referred to herein as 'faceprint' or 'facial features') and voice, among others.”However, the magazine states this same state law specifically excludes biometric information extracted from other sources or items like photos as a biometric identifier category.The plaintiff's attorney has stated that whether or not Facebook's biometric data obtained through facial recognition software is subject to state law is “statutory interpretation which has not yet been ruled upon,” according to the Facebook biometric data class action lawsuit.In April, Carlo Licata, of Cook County, claimed the social network violated Illinois privacy laws by not providing him with written notification that his biometric data was being collected or stored.A Facebook spokeswoman told Business Insider that “This lawsuit is without merit and we will defend ourselves vigorously.”