while the Olmsted County Sheriff’s Office was responding to a single-vehicle crash [...] Officers immediately noticed a corpse in the backseat, which was wrapped up tightly in a blood-soaked blanket.
A warrant was then obtained to search [victim's] Minneapolis apartment.
[...] the victim’s bed and bedding were saturated with blood. There was also a butcher’s cleaver missing from the apartment.

Some additional reporting.

[Criminal] compliant describes Lewis as the former romantic partner of Tsai, who had a gaping wound to the neck [doc says "around the carotid artery"] when found.
The vehicle was estimated at 105 mph when it crashed, and Tsai's dog was found wandering at the scene of the crash.

Officers spoke with the victim's former spouse, who indicated that Victim was planning to have Defendant visit [it for a week.]

5 hours after Tsai picked up Lewis from the airport, Lewis was driving from the apartment with Tsai's body and dog.

the victim's former spouse indicated that the relationship between Victim and Defendant was sordid and emotionally challenging.

Bets on the sex of this former spouse?