Paul and Ketih Caneiro are brothers and business partners. They live 10 minutes from one another in New Jersey and on November 20, 2018,  both of their homes were on fire.  About 5 a.m. the police received a report of a fire burning at 27 Tilton Drive in Ocean Township, Paul Caneiro's home.  Arriving on the scene police and fire fighters find Paul, his wife, and two adult daughters , all safe outside the home.  In the first hours of the investigation officials determine the fire at Paul Caneiro's home appears to have been intentionally set and gas cans are found on the premises. While the investigation is taking place at Paul Caneiro's home, a fire is reported at the home of Keith Caneiro.  While the fire at Paul Caneiro's home consisted of two fires near the perimeter of the home,  the fire at Keith Caneiro's home takes 20 fire companies hours to get under control.  Investigators quickly discover the fire at Keith Caneiro's mansion was staged to cover up the murder of Keith Caneiro, his wife, Jennifer, and their two young children, Jesse, 11 and Sophia, 8.  Keith's body is found in the front yard, dead from multiple gunshot wounds to the head and back.  The body of Jennifer Caneiro is found inside the house with a gunshot wound to the head and multiple stab wounds. The bodies of the children are found inside with multiple stab wounds.  Joseph Scott Morgan will explain the different scientific disciplines used in solving a murder or multiple murders when fire is used to destroy evidence.     Transcript Highlights 00:00.54 Introduction, 02:00.69 Joe's respect for firefighters 04:55.44 Fire and murders took place in November 2018 10:04.10 Fire started on purpose  15:16.22 DNA expert from New Zealand  21:01.75 A financial motivation to the murders 24:56.51 Paul accused of taking money from college accounts for Keith's children 30:13.51  Data presented in court will be very complex 35:10.18 Fire at Paul Caneiro home, two set in perimeter areas of home 39:59.24 Mansion is not close to neighbors 42:43.90 Keith shot multiple times, no gun found  See omnystudio.com/listener for privacy information.