On October 6, 2005, nineteen-year-old Kareem Johnson was stabbed aboard a Route 13 trolley in Yeadon, Pennsylvania. The attack left investigators with two crime scenes, conflicting witness accounts, limited physical evidence, and no usable surveillance footage. The case that emerged would rely heavily on human observation—and would be challenged in court for years.

Blood on the Trolley is written by the detective sergeant who led the homicide investigation.

This is not a dramatized true-crime story. It is a clear, documented account of how a real case unfolded—from the first radio call through arrest, trial, retrial, appeals, and post-conviction litigation. Drawing from official police reports, court records, forensic findings, and firsthand investigative experience, the book examines how cases are built when certainty is incomplete and every decision must withstand scrutiny.

Readers are taken inside the realities rarely shown in crime narratives:

• how eyewitness memory is evaluated
• how composite sketches shape investigations
• how cases proceed without DNA or digital evidence
• how investigative choices echo years later in court

Written with restraint and precision, Blood on the Trolley focuses on process over outcome. It does not argue for guilt or innocence, and it does not sensationalize violence. Instead, it documents how the criminal justice system responded to one act of violence—and how that response was tested over time.

This book is ideal for readers interested in:

• serious true crime grounded in fact
• police procedure and homicide investigations
• criminal trials and post-conviction review
• the limits and strengths of eyewitness-driven cases

Blood on the Trolley is a case study in investigation, accountability, and endurance—told by the detective who carried the case from the first night to its final review.