Mario Hernandez arrested for chain-reaction crash on Highway 78

Unsecured load on commercial truck scatters debris into traffic at NAD Road

December 13, 2025 | North Charleston, SC

A man has been charged with involuntary manslaughter following a fatal collision caused by scrap metal debris from his unsecured truck load on Dec. 13.

Mario Alavez Hernandez was arrested after debris from a commercial truck load led to a woman’s death at NAD Road and Highway 78 in North Charleston.

What Happened in the Crash?

The incident unfolded at the intersection of Highway 78 and NAD Road in North Charleston. According to the North Charleston Police Department, a vehicle struck debris scattered on the roadway, leading to a deadly crash with a commercial truck. The debris originated from a truck driven by Mario Alavez Hernandez, whose load was not properly secured.

Key details include:

• Date and Time: Dec. 13, 2025, around midday
• Location: Highway 78 and NAD Road, North Charleston, South Carolina
• Vehicles Involved: Commercial truck carrying scrap metal and a passenger vehicle
• Outcome: One woman killed
• Suspect: Mario Alavez Hernandez, arrested and booked into Charleston County Jail

While Hernandez's truck was not directly part of the collision, authorities held him accountable for the unsecured cargo that precipitated the event. The investigation continues to uncover additional factors.

Why Do These Accidents Happen?

Unsecured loads pose significant risks on highways, turning routine drives into potential disasters. Debris from improperly tied-down cargo can fly off vehicles, creating hazards that drivers have little time to avoid.

Common causes of such incidents include:

• Inadequate securing of materials during transport
• Overloaded vehicles exceeding safe capacity
• Driver oversight or haste in loading procedures

To illustrate the scale of this issue, consider data from the Federal Highway Administration (FHWA):

These figures underscore the need for stricter enforcement and awareness. The Centers for Disease Control and Prevention (CDC) also highlights how such events contribute to broader road safety challenges, emphasizing prevention through proper load management.

Legal Insights

In cases such as this, determining the precise causes of accidents is essential. National legal analysts with Newsline provide perspective on navigating these complex situations.

“It is imperative to come to a determination of the exact cause of these types of accidents. An attorney has the resources to review applicable insurance coverage, hire witnesses, run background checks, and locate witnesses. We carefully guide the family of the victim through the process,” said Candice Bond, managing partner with Bond Legal.

Key takeaways from analyst insights:

• Independent investigations help preserve critical evidence beyond police reports.
• Legal professionals can assess contributing factors like driver history and insurance details.
• Serving as an advocate ensures families receive comprehensive support during investigations.

“In addition to a police report, an attorney will carefully review what may have contributed to the crash. A lawyer has the resources to hire witnesses, conduct drivers’ background checks, locate witnesses to the crash and review applicable insurance coverage,” said Bond.

Potential Wrongful Death Claims

Families affected by such tragedies may pursue wrongful death claims to seek compensation for loss of companionship, pain and suffering, and emotional distress. These claims address the profound effects of catastrophic accidents.

"The stress and sorrow can be extremely overwhelming after losing a loved one in an accident," said Stefano Formica, of counsel at Bond Legal. "We understand just what families are forced to go through, and protecting their rights is vital. A wrongful death lawyer will stay updated on the official investigation and help ensure that their legal rights and best interests are protected."

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