Crime incidents embedding using restricted Boltzmann machines

ABSTRACT We present a new approach for detecting related crime series, by unsupervised learning of the latent feature embeddings from narratives of crime record via the Gaussian-Bernoulli Restricted Boltzmann Machine (GBRBM). This is a drastically different approach from prior work on crime analysis, which typically considers only time and location and at most category information. After the embedding, related cases are closer to each other in the Euclidean feature space, and the unrelated cases are far apart, which is a good property can enable subsequent analysis such as detection and clustering of related cases. Experiments over several series of related crime incidents hand labeled by the Atlanta Police Department reveal the promise of our embedding methods. Index Terms-- Unsupervised learning, crime data analysis, feature embeddings, neural networks 1. INTRODUCTION A fundamental and one of the most challenging tasks in crime analysis is to find related crime series [1], which are committed by the same individual or group.