Photos: Brittany Zimmermann homicide case over the years
From the Brittany Zimmermann homicide: Read the original reports series
Here's a look back at the Brittany Zimmermann murder case over the years. The April 2, 2008, slaying of the UW-Madison student has not been solved. Her parents have now revealed that police have matched her killer's DNA but do not have enough evidence yet to make an arrest.
Brittany Zimmermann
Photo of Brittany Zimmermann
Brittany Zimmermann crime scene
Police closed off the 500 block of West Doty Street on April 2, 2008, the day of Brittany Zimmermann’s slaying. Police say they have DNA evidence from a burglary that occurred three months later that matches DNA from the Zimmermann scene.
Zimmermann apartment
Police tape cordons off the crime scene as the investigation of Brittany Zimmermann's murder continues.
Vigil for Brittany Zimmermann
People line up in the Great Hall of Memorial Union on April 6, 2008, to sign a commemorative UW flag before a memorial gathering for 21-year-old Brittany Zimmermann, who was killed Wednesday in her off-campus apartment.
Zimmermann photo at vigil
People wait in line to sign a University of Wisconsin flag before a vigil April 6, 2008, for slain UW-Student Brittany Zimmermann.
Zimmermann vigil
State Journal Students, staff, friends and family of slain UW-Madison student Brittany Zimmermann gathered for a candlelight vigil April 6, 2008, around the fountain at Library Mall.
Questions about emergency call
Public Safety Communications (911) director Joe Norwick responds to questions about the Brittany Zimmermann murder in a press conference at the City-County Building in Madison on May 1, 2008. The 911 Center mishandled a call from Zimmermann's cell phone around the time she was killed.
Reward fund announced
Kevin Zimmermann, center, father of slain UW-Madison student Brittany Zimmermann, bows his head as Kim Heeg, right, Zimmermann's aunt, on Wednesday announces a reward fund for information leading to an arrest and conviction in the case. Joining them, from left, are: Zimmermann's mother, Jean; grandmother, Jeannette Andres; and JoAnn Gonnering, mother of Zimmermann's fiance, Jordan Gonnering. Also present but obscured from view are Gonnering's father, Dennis, and sister Jenna Krasselt.
Family photo of Brittany
Brittany Zimmermann's smiling face is framed beside a wooden angel in the Marshfield home of her aunt, Kim Heeg. The UW-Madison junior who planned to become a physician was slain in her Downtown apartment on April 2, 2008.
Zimmermann family
Jean Zimmermann, mother of slain UW-Madison student Brittany Zimmermann, holds a necklace she wears that has an impression of her daughter's thumbprint.
Zimmermann's thumbprint
Jean Zimmermann, mother of Brittany Zimmermann, holds a necklace she wears with an oval medal bearing an impression of Brittany's thumbprint in Marshfield on Oct. 8, 2008.Â
Zimmermann fliers
Kevin Zimmermann, right, and Jean Zimmermann hang a flier on a tree in Brittingham Park on Oct. 18, 2008. The Zimmermanns, parents of murdered UW student Brittany Zimmermann, were distributing fliers with her picture in the hope that a growing reward fund will bring information to help police find their daughter's killer.
UW Carillon rings for Zimmermann
Family and friends of UW-Madison student Brittany Zimmermann, who was slain in her Downtown apartment on April 2, 2008, gather April 2, 2009, at the UW Carillon Tower to mark the one-year anniversary of her still unsolved murder. The tower's bells rang 21 times, once for each year of Zimmermann's life. At right, members of Zimmermann's family and other loved ones attend the ceremony Thursday. From left are aunt Kim Heeg; grandmother Jeannette Andres; aunt Donna Beining; JoAnn Gonnering, mother of Brittany's fiance, Jordan Gonnering; and Jean and Kevin Zimmermann, Brittany's parents.
Zimmermann Memorial 5K Run/Walk
About 400 people gathered on UW-Madison's Library Mall on Oct. 2, 2010, to participate in the Brittany Zimmermann Memorial 5K Run/Walk. The walk was meant to celebrate Zimmermann and raise money for a reward fund to solve her homicide.

