Andrew Messina's mom called Cherokee 911 when her son threaten to kill them both in their Eagle Watch home in Towne Lake.
Lisa describes her son's medications, past counseling, how he obtained the gun she believed to be locked in their home, what she said triggered his actions and how he threatened to kill them both to the 911 operator.
Listen to the recordings divided into four segments above.
For details about how the student was killed, check here:
To watch a video interview from Cherokee Sheriff Roger Garrison as he explains how the incident occured, check here: