Before opening fire at the school, the suspect allegedly shot and killed her mother and step-brother

Authorities say they have identified the suspect, who was described in a police alert as a woman with brown hair wearing a dress

Police have confirmed that two people were killed at a residence near the school, with cops believing the two shootings are connected

Police identified 18-year-old Jesse Van Rootselaar as the suspected shooter

Among those killed are 12-year-olds Abel Mwansa Jr. and Kylie Smith, according to their families

Jesse Van Rootselaar may have been trying to murder his younger sister and brother, Duncan McKay tells The Telegraph

Before opening fire at the school, the suspect allegedly shot and killed her mother and step-brother