Shakeia had taken measures to safeguard herself.
Mr. Darien now faces several charges including theft, stalking, disruption of school operations, and retaliation against a witness.
Shakeia had recently obtained a restraining order against her former partner.
Another victim, an unrelated 20-year-old woman, was hit by a stray bullet while seated in her vehicle.
The temporary lockdown at the school has been lifted.
The shooting occurred in the parking lot of a strip mall referred to as the Security Business Center, situated at 1808 Woodlawn Drive.