We receive all crime data from third party sources, CrimeReports and SpotCrime, which are updated on our site periodically.
Crime Maps leverages geodata from multiple partners, including CrimeReports.com, EveryBlock.com and SpotCrime.com, who work with hundreds of police agencies, crime feeds and news outlets to create a curated map of criminal activity in many metropolitan areas. Users can view crimes in a specific area, toggle between multiple neighborhoods, and directly compare the crime statistics of two different regions. Trulia also enables users to add insights, comments, and advice via Facebook’s Social Comments for additional context and information on top of the geodata.
You can read more about Trulia Crime maps here.