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Police Bureau

Sworn to protect. Dedicated to serve.

Phone: 503-823-0000

Fax: 503-823-0342

Non-Emergency: 503-823-3333

1111 S.W. 2nd Avenue, Portland, OR 97204

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Case #86-43140

On April 30, 1986, Michael Koseniensky and his wife were at their home on the 3500 block of SE 80th Avenue when a knock was heard at the front door at approximately 9:58 pm.

Mr. Koseniensky, a 33-year-old white man, answered the door and was shot. After hearing the gunshots, Mr. Koseniensky's wife found him lying on the entry way floor and called 911 immediately. Mr. Koseniensky was transported to a nearby hospital. He ultimately succumbed to his wounds on June 20.

Michael Koseniensky was reported to be a mechanic and car salesman. He was married and had no children. Mr. Koseniensky may have been involved in the sale of drugs at the time of his murder.

The Cold Case Unit would like anyone with information regarding this case to contact them. Witnesses may contact Cold Case Homicide Unit investigators directly at (503) 823-0400. To remain anonymous, witnesses may provide information through Crime Stoppers of Oregon.

Crime Stoppers is offering a cash reward of up to $1,000 for information, reported to Crime Stoppers, that leads to an arrest in this case, or any unsolved felony, and tipsters can remain anonymous.

Information learned from social media sites such as Facebook, Twitter or YouTube should be shared with investigators as these tips may lead to the identification of a suspect or suspects. Links can be shared directly with investigators or anonymously through Crime Stoppers.

Leave a Crime Stoppers tip online at text CRIMES (274637) and in the subject line put 823HELP, followed by the tip, or call (503) 823-HELP (4357) and leave the tip information. Tips can be left in English or Spanish.

Visit to download the Crime Stoppers App for the iPhone or Droid.