The deputy, Benjamin Nimtz, 30, was responding to the call around 3 a.m. when his vehicle crashed with a Toyota Tundra at an intersection in Deerfield Beach, which is about 20 minutes from Fort Lauderdale, according to The Broward Sheriff's Office.
In a Facebook post, the office said another deputy, who was heading to the domestic call in a separate vehicle, witnessed the crash and “immediately called for help.”
Broward Sheriff Fire Rescue rushed Nimtz and the only person who was in the pickup truck, Darran Johnson, 32, to a nearby hospital.
Nimtz “succumbed to his injuries” and was pronounced dead at the hospital, according to the Facebook post.
Johnson, of Pembroke Pines, Fla., was hospitalized in stable condition.
Traffic homicide detectives were investigating the cause of the crash and said Johnson's "excessive speed was a contributing factor to the crash," the sheriff's office said.
"Based on the preliminary investigation and the extent of damage to both vehicles, detectives said Johnson was speeding," the office said, adding that detectives were awaiting the results of Johnson’s toxicology test.
Nimtz has been a deputy with the Broward Sheriff’s Office since March 2018.
“This morning our hearts are heavy. The Broward Sheriff’s Office family is grieving the loss of a #BSO deputy who died after being involved in an on-duty crash early Sunday morning. We ask for thoughts and prayers,” the sheriff’s office tweeted.
The sheriff’s office saluted Nimtz with a procession on Sunday morning, local media reported. A photograph on Twitter showed deputies lined up outside the hospital saluting a flag-draped casket.
Florida police departments offered condolences on Sunday. Miami-Dade Police tweeted, “Our hearts go out to the family, friends and colleagues of the fallen deputy. #MDPD stands with you. #NeverForget”
Florida Sen. Rick Scott tweeted on Sunday afternoon, “Our law enforcement officers put their lives at risk each day to protect us and keep our communities safe.”
Scott added that he was sending his thoughts and prayers to Nimtz’s loved ones.