Purchased at the Edmonton Public Library's book sale.

Book description - from Amazon.ca:

Max Parkman—autistic and whip-smart, emotionally fragile and aggressive—is perfect in his mother's eyes. Until he's accused of murder.

Attorney Danielle Parkman can't deny her son's behavior has been getting worse—drugs and violent outbursts have become a frightening routine. But the diagnosis she receives from a top-notch adolescent psychiatric facility that Max is deeply disturbed—and dangerous—is too devastating to accept.

Until she finds Max, weapon in hand, at the bedside of a fellow patient who has been brutally stabbed to death.

Trapped in a maelstrom of doubt and fear and barred from contacting Max, Danielle's mothering instincts snap sharply into focus. The justice system is bearing down on them, so she must use her years of legal experience to find out the truth, no matter what that might be. But has she, too, lost touch with reality? Is her son truly a killer?