Newly released arrest documents paint a picture of an increasingly strained and violent relationship in the days before a Clear Creek High School graduate was taken, unconscious, to a Luling hospital where she died two days later.

Cayley Mandadi, 19, of League City was pronounced dead Oct. 31 in a Luling hospital, according to a probable cause affidavit.

She had been attending Trinity University in San Antonio after graduating in 2016 from Clear Creek High School in League City, officials said.

“The Wildcat family was saddened to hear of the death of our former student, Cayley Mandadi, back in October,” said Jamey Majewski, principal at the high school.

Mandadi was a communications major, a member of the Chi Beta Epsilon sorority and a member of the Trinity Cheer team, said Sharon Schweitzer, a spokeswoman for Trinity University in a previous interview with The Daily News.

The case took its latest turn Wednesday when Mark Howerton, 22, was charged with murder and aggravated sexual assault in connection to Mandadi’s death and turned himself into police, documents show.

Howerton, of Tyler, had taken Mandadi to the Luling hospital Oct. 29, according to the affidavit.

Mandadi was unconscious, naked from the waist down and had bruises and cuts on her body, according to the affidavit.

Howerton told police the next day he had known Mandadi for about eight months and the two had been dating about four weeks, according to the affidavit.

Howerton told investigators that the two had been at a music festival that weekend and had been drinking and smoking marijuana and had argued about Mandadi’s former boyfriend before she had agreed to go to Houston, according to the affidavit.

Howerton told police that while the two were driving from San Antonio to Houston they stopped at a gas station just outside of Bexar County and had “rough makeup sex,” according to the affidavit.

Howerton told investigators that after the encounter, Mandadi said she wasn’t feeling well and fell asleep in the car, but that he later noticed she had stopped breathing, according to the affidavit.

Through interviews with Mandadi’s former boyfriend and college friends, investigators came to suspect that Howerton had had several violent encounters with the Trinity student before Oct. 29, according to the affidavit.

Mandadi’s former boyfriend told police she had told him about a fight with Howerton and that he had slammed her head into the passenger window of a car in September after ransacking her dorm room, according to the affidavit.

One of Mandadi’s sorority sisters also alleged an instance when Howerton had threatened to throw Mandadi off a balcony at her dormitory, according to the affidavit.

Another sorority sister reported seeing several bruises on Mandadi and she alleged she had witnessed Howerton brandishing a gun when she had accompanied Mandadi to get a cellphone back from him, according to the affidavit.

Several of Mandadi’s roommates told investigators that Howerton had damaged their dorm room during an argument with Mandadi, according to the affidavit.

That incident was reported to campus police who eventually banned Howerton from the campus for a year, according to the affidavit.

Several witnesses told police they thought Howerton’s anger might stem from steroid abuse and that they thought he had been dealing steroids, according to the affidavit.

An autopsy found Mandadi died from blunt force trauma to the face and head leading to a subdural hematoma that caused brain swelling, according to the affidavit.

Investigators also found evidence of sexual assault, according to the affidavit.

Howerton’s bond is set at $250,000, according to the Bexar County Magistrate’s Office.

Matt deGrood: 409-683-5230;



(3) comments

Stephanie Martin

So sad!

Ron Shelby

I really hope that Roady puts his best DA on this. If not, voters should watch.

johnferguson Staff
John Wayne Ferguson

Hi Ron, the case is being tried in Bexar County, not Galveston County, which is where the crime is alleged to have happened. The victim was a League City native.

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