How were authorities able to arrest the murder-for-hire suspect in the Madison County case?

Authorities successfully arrested Marty Shaw as a suspect in the alleged murder of Portia Rowland by employing advanced technology to track his movements. During a news conference, officials explained that they utilized license plate readers to monitor the suspected vehicle, which ultimately led to Shaw's apprehension. This case, stemming from a deadly love triangle in Madison County, Illinois, highlights the effectiveness of modern surveillance techniques in solving complex crimes. The arrest represents a significant breakthrough in the investigation of what appears to be a murder-for-hire scheme involving jealousy and betrayal.