A broadside collision on Sunday killed four people, including three members of a Turlock family, according to the California Highway Patrol.

The two-vehicle collision resulted in the deaths of Daniel Lourenco, 44 Jennifer Lourenco, 45, and their 16-year-old daughter Madelynn. The couple’s 19-year-old daughter and 14-year-old son both sustained major injuries in the crash. The Lourenco family was traveling in a 2023 Jeep SUV.

The fourth fatality was the driver of a 2008 Infiniti sedan, identified as Uriel Guizar-Negrete, 22, of Modesto.

The collision was reported at 9:25 a.m. Sunday at the intersection of Lander and Greenway avenues. Greenway has posted stop signs but Lander does not.

Guizar-Negrete was driving the Infiniti northbound on Lander at a high rate of speed, according to the CHP. The Lourenco vehicle was stopped at the stop sign at Greenway and entered Lander, where it was struck by the Infiniti.

The front of the Infiniti struck the left side of the Jeep. Guizar-Negrete was not wearing a seat belt and was ejected from the vehicle. He was pronounced deceased at the scene.

Both Daniel and Jennifer Lourenco sustained fatal injuries and died at the scene of the collision.

Madelynn was sitting in the left rear side of the Jeep. She was rushed to Doctors Medical Center, where she succumbed to her injuries, according to the CHP.

Pitman High School posted on Monday that the Lourencos were part of the Pitman family and were offering support to staff and students.

“As many in our community may already be aware, on Sunday morning a Pitman family was involved in a fatal traffic collision,” the post stated. “We are deeply saddened by this tragedy and our hearts go out to this family and their loved ones during this difficult time. Pitman will have counselors and chaplains to support students, faculty and staff throughout the week. Please keep this family in your thoughts and prayers.”

In honor of the Lourenco family, the Pitman High FFA is holding a candlelight vigil at 7:15 p.m. today at the flagpole near the school’s office, 2525 Christoffersen Parkway in Turlock.

Jennifer Lourenco was a teacher at Sinclear Elementary in the Ceres Unified School District. 

Sinclear Elementary School Principal Shane Hulin sent a message to parents notifying them of the death, writing: “It is with the heaviest heart that I share with you a devastating loss over the weekend. Our teacher, Jennifer Lourenco, and her family were involved in a vehicle collision Sunday morning. Tragically, Jennifer, her husband, Daniel, and the youngest of their two daughters did not survive. Their son and oldest daughter are being treated for major injuries.

“Jennifer taught special education students with kindness, patience, and unwavering dedication. She was a cherished colleague and friend whose warmth and positivity touched countless lives in our school community and beyond.

“Please join me in keeping the surviving Lourenco children and the family’s loved one in your thoughts during this incredibly difficult time.”

Jennifer Lourenco, who taught moderate-severe special needs students, was named “Teacher of the Year” for the 2023-24 school year.

Ceres Unified School District spokeswoman Beth Jimenez said the district is providing counseling staff and resources to Sinclear students and all other sites to help students process their grief.

“While we are still processing this unimaginable tragedy, our hearts go out to members of the Lourenco family and their loved ones,” a statement released by CUSD said. It went on to call Mrs. Lourenco a “gifted and dedicated educator and beloved colleague whose loss will be deeply felt throughout the school community.”

The Lourenco family were members of Our Lady of the Assumption Catholic Church in Turlock.

“We extend our deepest prayers, condolences, and love to the Lourenco Family and the entire community,” said Father Larry Machado, the Parochial Administrator at Our Lady of the Assumption Catholic Church. “Our hearts are with all who are grieving during this time of profound sorrow.  As cherished and dedicated members of our parish family, the Lourenco Family holds a special place in our hearts.  We mourn the loss of Daniel, Jennifer, and Mady, and we lift up Emma and Matthew in prayer.  In this time of tragedy, may God's love, grace, and strength surround the family and all who are grieving.  We recognize that this loss impacts many in our parish and beyond. For those seeking spiritual or emotional support, our parish is here to help. Please do not hesitate to contact Our Lady of the Assumption Parish (209) 634-2222.”

Daniel Lourenco was previously a manager with Turlock Irrigation District.

All passengers in the Jeep were wearing their seatbelts at the time of the collision. 

It is unknown at this time if drugs and/or alcohol contributed to this crash.

The investigation is ongoing.

— Ceres Courier Editor Jeff Benziger contributed to this story.