Federal Bureau of Investigations (FBI) has called on the assistance of local law enforcement officials and community members in the case of a confessed serial killer.

Israel Keyes is believed to have traveled through various cities in and around the Dallas/Fort Worth Metroplex in February 2012 before being arrested in the Lufkin area in March and extradited to Alaska.

Keyes committed suicide in December while incarcerated in Anchorage, Alaska. Now, federal authorities are working to piece together his activities as he made his zig zagged his away across the country and into Canada and Mexico for more than a decade. While he will not face justice, officials hope to map out Keyes' activities in an effort to identify potential victims and better understand his activities and crimes.

More recently, Keyes is suspected of visiting Post Oak Cemetery in Glen Rose sometime between February 12 and 16. Prior to his suicide, Keyes admitted to traveling through Cleburne, Azle and Aledo. Investigators suspect his rental car became stuck in the mud in Cleburne during the same time frame.

The FBI is seeking individuals who had contact with him or his rental vehicle, a 2011 Kia Soul with license plate CN8 M857 during that time period.

According to report at wfaa.com, Johnson County officials began posting flyers across the county Thursday and officials there are hoping information gathered from the effort could help solve a murder that occurred last February.

In a series of interviews with law enforcement, Keyes described significant planning and preparation for his murders, reflecting his meticulous nature. It wasn't unusual for Keyes to fly into an airport, rent a car, and drive hundreds of miles to his final destination.

In the case of Bill and Loraine Currier, Keyes reportedly flew into Chicago, rented a car, and drove across several states before arriving in Essex, Vermont.

Investigators believe Keyes did not know any of his victims prior to their abductions. He described several remote locations that he frequented to look for victims—parks, campgrounds, trailheads, cemeteries, boating areas, etc. Keyes also told investigators that prior to the Currier case, his victims’ disappearances received little - if any - media coverage.

According to a TIME report, Keyes kidnapped 18-year-old Samantha Koenig from an Anchorage coffee shop on February 1, prior to flying into Houston and traveling to various locations prior to his arrest.

While in custody, he reportedly admitted to murdering at least eight people before murdering himself.

Individuals with information on the suspect are asked to call 1-800-CALL-FBI, Somervell County Sheriff's Office at (254) 897-2242 or Johnson County Sheriff at (817) 556-6058.