Philadelphia Chief of Detectives Keith Sadler called Timoney on Monday to ask for his help. So did Greg Singleton, the homicide detective responsible for the investigation.
Timoney immediately pulled together a task force in Miami and reached out to local television stations to air the suspect's image every half-hour.
Lewis was in custody in less than 24 hours.
For elated Philadelphia police officers, who had searched for the suspect around the clock, the news was welcome.
"This is the happiest sad day that I've had in a long time," said Sgt. Tim Cooney, a member of the Philadelphia task force created to catch Cassidy's killer.