Daniel Stillwell, the 23-year-old suspect wanted in the Oct. 17 murder of a Texas State student and her boyfriend, shot himself before driving his car over a cliff, according to Mike Wellman, SMPD criminal investigations sergeant.
Wellman said there was a single gunshot wound in Stillwell’s head when police found him dead around 1 p.m. near the “Devil’s Backbone” in Comal County.
According to the arrest warrant for capital murder, Stillwell allegedly shot his ex-girlfriend, fashion merchandising senior Hailey Nicholls, 22, and her current boyfriend, 26-year-old Jesse Robledo. Police responded to two separate disturbance calls around at approximately 12:38 a.m. Oct. 17 in the Executive Townhomes apartment complex on the 300 block of Craddock Avenue and found the two dead.
Wellman said the official autopsy results have not yet been returned and usually take around four to six months to be finalized. He said a detective viewed the autopsy and determined that Stillwell shot himself prior to driving off the cliff.
Stillwell’s roommate Daniel Trottier told police the suspect had called him around 1 a.m. Oct. 17. Stillwell told Trottier he saw Robledo’s car outside of Nicholls’ apartment, according to the arrest warrant.
Stillwell went to his apartment, took Trottier’s firearm and broke into Nicholls’ apartment, the warrant says. Trottier described his handgun as a Glock 9mm pistol, according to the search warrant.
Wellman said Trottier will not face any consequences for owning the gun used in the crime.
The murder weapon was located at the scene of the car crash and had “fallen out of the car as it rolled down the cliff” near “Devil’s Backbone,” Wellman said.
Wellman said while SMPD officers believe the murder weapon and the gun located at the scene of the car crash were the same, they are awaiting lab results to match the gun and the bullets recovered from the crime scenes.
Wellman said no new details on the case have been uncovered since Oct. 17, the day of Stillwell’s death.
Wellman said officeres can only assume and speculate what Stillwell’s motive was and will never know for certain.
“The only person who will ever know his motive is Daniel Stillwell and he’s dead, and we didn’t get to ask him,” Wellman said. “So trying to determine a motive is impossible without actually having the person tell you.”