02/19/2013 at 11:30 AM EST
When Mindy McCready was found dead
on Sunday of an apparent suicide, the country singer was not alone: Her dog, who'd been fatally shot, was by her side.
But a source close to the star tells Fox News
that her decision to end the animal's life would "not have been an act of malice."
"Mindy really loved her dog," the friend said. "It would have been more of a case where she just didn't want to leave the dog alone."
The troubled star
, whose boyfriend, David Wilson, died
of a self-inflicted gunshot wound in January, was reportedly under investigation
at the time of her death. Police were concerned about details surrounding Wilson's passing.