New Braunfels emergency personnel were called to a home on Walnut Heights Blvd. Tuesday morning around 9:45 a.m. Upon arrival, they found Dianne Barrett deceased, said police spokesman David Ferguson.
"She was by herself at the time of her death," Ferguson said.
Comal County Justice of the Peace Mike Rust ordered an autopsy Tuesday. Detectives at the scene determined there were no signs of foul play.
First Baptist Church in New Braunfels, where Barrett was a ministry assistant, emailed a statement on her passing Wednesday.
"We were deeply saddened to learn of the passing of Dianne Barrett. We continue to pray for our Lord's mercy and comfort for our church family members who continue to grieve," the church said.
Barrett was not on the First Baptist bus that crashed March 29, killing 13 people on board, including her husband, Murray Barrett, 67, and leaving one injured.
The group was heading home to New Braunfels from a church camp near Garner State Park when a 2004 white Dodge dually rammed into the van.
The driver of the dually truck, Jack D. Young, was hospitalized in the crash and was later released. Young had not been charged as of early April, though the investigation is ongoing.
Court records released Tuesday revealed that Young had taken two pills of Clonazepam and the generic forms of Ambien and Lexapro. Young said Clonazepam made him sleepy and a state trooper said in a sworn statement he had probable cause to believe the 20-year-old was intoxicated at the time of the crash.
In Young's pickup truck, authorities found two intact marijuana cigarettes and give partially smoked joints.
Distrcity Attorney Daniel Kindred told mySA.com it could take at least 60 days before the investigation into the crash is complete and any charges are filed.
Directly after the crash, a witness said Young told him: "I'm sorry, I'm sorry. I was texting on my phone."