Wichita ? Tests on a .380-caliber automatic handgun found beside a highway in March 2001 tied it to a quadruple homicide, a single homicide and a carjacking committed three months earlier, a ballistics expert testified Monday.

Gary Miller, chief of the criminal ballistics division at the Sedgwick County Regional Forensics Science Center, testified at length about the casings and bullets recovered from the shooting sites and from autopsies of some of the victims.

The testimony came as prosecutors sought to link evidence to brothers Reginald and Jonathan Carr, on trial for five counts of capital murder and dozens of other charges.

Miller testified that even before the handgun was found, investigators had tied the casings and bullets from three crime scenes over a nine-day period to a single weapon.

Three months later, a member of a prison work crew found the alleged murder weapon along Kansas 96 near the soccer field where the quadruple killings occurred.

Test firings of the recovered handgun matched it to bullets and casings recovered from the scenes of all three crimes, Miller said.

Earlier Monday, Wichita police homicide supervisor Ken Landwehr testified that when investigators learned the victims of the quadruple killing were taken to ATMs before they were shot, they began looking at other similar ATM robberies and the Walenta case.

They went to the site where Andrew Schreiber was taken before his car tire was shot out, and recovered a bullet casing from the site.