SEATTLE (AP) — A 21-year-old man accused of assaulting a University of Washington student he was dating has been charged with murder.

King County prosecutors charged Casey Henderson on Wednesday with first-degree murder in the death of 22-year-old Katy Straalsund.

Seattlepi.com reports that prosecutors say Henderson had been heard yelling at Straalsund Sunday afternoon before beating and strangling her to death.

Police responding to a disturbance call say forced their way in and pulled Henderson off Straalsund after seeing her in a chokehold through a window.

Straalsund never regained consciousness and died at a Seattle hospital Tuesday.

Police reports say Henderson had been up all night high on LSD and became convinced Straalsund was plotting against him before the incident.

Henderson remains jailed on $2 million bail.

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