08/07/2026
On the evening of August 4, 1998, 17-year-old Lisa Taodora Kopf left her home in Edmonton's Callingwood neighbourhood with her 15-year-old sister.
The sisters attended a house party near 102 Street and 132 Avenue.
At approximately 4:30 a.m. on August 5, Lisa left the party alone. Investigators have never publicly disclosed why she left or where she intended to go afterward.
A few hours later, a farmer feeding cattle made a grim discovery in a slough located in a field west of Edmonton, near 184 Street and 118 Avenue.
Lisa's body was found partially submerged in mud and water.
Investigators determined that she had been murdered.
According to information released during the investigation, Lisa died after her face was forced into the mud and held there until she suffocated. Authorities also stated that she had no drugs or alcohol in her system at the time of her death. Investigators further reported that there was no evidence of s*xual assault, leading them to believe that robbery or s*xual violence may not have been the motive.
Lisa was known to some people by the name Monika Wiley.
One detail that emerged during the early stages of the investigation involved a report made to police at approximately 5:20 a.m. on the morning Lisa was killed. The call concerned a suspicious person near an abandoned building located a few hundred metres from where her body would later be found. Police have never publicly disclosed whether that individual was identified or whether the sighting was connected to the homicide.
To this day, no one has been charged in Lisa's murder.
Anyone with information regarding the murder of Lisa Taodora Kopf, also known as Monika Wiley, is asked to contact:
๐ Edmonton Police Service: 780-423-4567
๐ EPS File #: 98-80982
๐ Crime Stoppers (Anonymous): 1-800-222-TIPS (8477)
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