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Police Piece Together Sequence of Events Leading Up to Two Murders on I-35

Sacramento Martinez. Image by Bexar County.

Domestic violence along the I-35 corridor between New Braunfels and San Antonio Tuesday resulted in the deaths of a 33-year-old Austin woman with a protective order and a 45-year-old Mission man on his first trucking run.

In a statement Wednesday, New Braunfels Police Department (NBPD) said they have charged 32-year-old Sacramento Martinez of Austin with capital murder in the deaths of Marisol Martinez and Daniel Sieger.

He is being held without bond at Bexar County Jail on a warrant related to a family-violence incident from March 2019. New Braunfels police detectives have obtained an arrest warrant charging him with capital murder.

As of Wednesday, Martinez was awaiting transfer to the Comal County Jail. Additional charges may be pending.

Police believe he shot Marisol Martinez, with whom he had a previous relationship, and left her body in a black Ford Expedition parked in the 3900 block of I-35 North in New Braunfels around 2:50 a.m. on Tuesday then fled on foot across the highway toward the TA Truck Stop.

As first responders arrived at that scene of what they believed was a single-vehicle accident, law enforcement received reports of gunshots and an 18-wheeler peeling out of the TA Truck Stop in the 4800 block of I-35.

Forty-five minutes later the truck, which was driving erratically on I-35, crashed in the downtown San Antonio area. Police discovered Sieger’s body in the cab, and believe he was shot at the truck stop.

Martinez fled the scene on foot but was captured and taken into custody by San Antonio police.

Marisol Martinez had a protective order against Martinez stemming from a family violence/strangulation incident from March of 2019.

An investigation is ongoing by numerous law enforcement agencies including NBPD, SAPD, the Travis County Sheriff’s Office and the Austin Police Department. NBPD said no further information will be released.

In Texas, a charge of Capital Murder can be made when more than one person is killed during the course of a criminal episode, or if a person commits homicide while also committing another felony (see Texas Penal Code Sec. 19.03).

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