University of Houston Professor Stabbed to Death With Stiletto Heel Alf Stefan Andersson, 59, was a research professor at the University of Houston.

June 10, 2013 -- A Houston woman was charged with murder after she allegedly stabbed a University of Houston professor to death with a stiletto heel at a luxury high-rise condominium.

Ana Trujillo, 44, was arrested and charged this weekend when police found her boyfriend, Alf Stefan Andersson, with multiple stab wounds to the head lying on the floor of an apartment early Sunday morning, Houston police said in a news release.

Andersson, 59, worked as a research professor at the University of Houston Center for Nuclear Receptors and Cell Signaling since 2009. His focus was on women's reproductive health, the University of Houston said in a statement.

"The University of Houston community is saddened to learn of the tragic death of Professor Stefan Andersson. Our hearts go out to his colleagues, family and friends during this difficult time," the university stated.

Police got a call about an assault-in-progress at the apartment on the 18th floor of The Parklane building in Houston at about 3:50 a.m. Sunday. When they arrived, Trujillo answered the door and investigators saw Andersson lying on the floor of the residence, according to the release, which was issued before Andersson was publicly identified.

The man was pronounced dead at the scene, the news release said. Trujillo was detained for questioning and subsequently charged with using the spindly heel to kill him.

The release makes no mention of whether police believe Trujillo was wearing or holding the shoe during the alleged attack.

It is unclear to whom the apartment belongs.

Trujillo is being held on $100,000 bond.

The county district attorney's office is handling the case and attempting to figure out exactly what happened the night of the fatal stabbing, Harris County District Attorney spokeswoman Sara Kinney told ABC News.

Trujillo is due in Harris County District Court Tuesday morning for a preliminary court appearance. ABC News has been unable to reach Trujillo and it's unclear whether she has an attorney.

A woman who answered the phone at The Parklane leasing office declined to comment.