‘Bizarre’ behavior precipitated stabbing, standoff

Shawn Edward Mahan held police tactical teams at bay for three hours

Shawn Mahan, November 3, 2016 (KOIN)
Shawn Mahan, November 3, 2016 (KOIN)

PORTLAND, Ore. (KOIN) – The man who is accused of slashing his friend’s neck and then holding police tactical teams at bay for three hours while inside a burning building was described as acting “bizarre.”

Shawn Edward Mahan appeared in court on Thursday charged with one count of first-degree assault.

KOIN 6 News learned the victim who was stabbed is actually a close friend of Mahan. According to police, the men were walking together in Southeast Portland early Wednesday and that Mahan was described by the victim as “acting bizarre.”

A man barricaded himself inside a burning garage on November 2, 2016. (PPB)
A man barricaded himself inside a burning garage on November 2, 2016. (PPB)

It’s not clear what led Mahan to slash the victim’s neck and hand. If police have a motive, they haven’t released it.

But, according to court documents, the victim was able to wrestle the knife away from Mahan. He may have been injured as a result of the fight over the knife.

According to police, after being stabbed, the victim “walked into the hospital.” His neck injury was considered life-threatening and he was rushed to OHSU. His condition has not been updated.

As police were investigating the stabbing, they got called out to a home near SE 127th and Rhone. That’s where they spoke to a woman who told them Mahan had shown up and was still acting very bizarre.

The woman is known to Mahan, but their relationship isn’t clear.

She left the house after seeing Mahan gather up kitchen knives and a torch, according to court documents.

Mahan eventually surrendered. Additional charges against him are likely, according to police.

Shawn Edward Mahan in his booking photo on November 2, 2016. (MCSO)
Shawn Edward Mahan in his booking photo on November 2, 2016. (MCSO)