But instead of helping a stranded motorist, they rode their motorcycles into a barrage of gunfire unleashed by the Bonnie Parker and Clyde Barrow gang.
There were different witness accounts of what happened that day on Highway Texas 114 and Dove Road, in present-day Southlake.
One states that gang member Henry Methvin did all the shooting, and another account says Bonnie wanted to help the fatally wounded officers.
Still another says she stepped out of the car and shot the two men again.
What is clear is that patrolmen Ed Wheeler (below) and H.D. Murphy were added to the gang's grim legacy of violence.
The gang was known for its stockpile of weapons: numerous handguns, several shotguns and rifles, and even a couple of Browning automatic rifles.
They robbed banks and other businesses with reckless abandon and fast getaways.
Clyde had already been arrested and jailed for a series of robberies before he met Bonnie in 1930. They fell in love, and a blazing legacy ensued.
The media got hold of pictures of the couple after police recovered rolls of undeveloped camera film left by gang members after one of their escapes.
The photos (like the one above) added to the romantic image of the young bandits, but that gradually faded as the body count grew.
Twelve people are known to have been killed by the gang in Texas and other states, and nine of them were law enforcement officers. Included was Tarrant County Deputy Malcolm Davis in 1933.
But 1934 would also be a fateful year for the lover bandits.
In February, Frank Hamer, a retired Texas Ranger captain and renowned man hunter, was tasked with stopping the gang.
That's what happened on May 23, 1934 when Hamer's posse ambushed Bonnie and Clyde near Gibsland, La.
There are many other important dates in the Bonnie and Clyde time line. Be watching "Famous Crimes" for another installment.
-- Bill Miller