PORTLAND, Ore. (AP) — A Clackamas County jury has found a man guilty of murder in the stabbing death of his roommate at a Milwaukie residence for people overcoming substance abuse addiction.

The Oregonian/OregonLive reports the case against Dean Boettcher relied on witness accounts, DNA evidence on the murder weapon and his own statements about the death of Matthew Timmons. Timmons was fatally attacked Oct. 18, 2016.

Authorities say Timmons was stabbed 19 times.

Jurors reached a verdict after one hour and 45 minutes. The trial began Oct. 22 in Clackamas County Circuit Court.

Boettcher’s motive was not clear; witnesses said he was upset about a variety of mundane things before Timmons was stabbed.

His attorney, Ronald Gray, did not immediately respond to a request for comment.

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Information from: The Oregonian/OregonLive, http://www.oregonlive.com