Kenichi Philips was shot dead as he sat in a parked car in Ladywood in March.
Solihull Man Given Hospital Order For Killing Parents
The victims were Chang's parent Pin Chang aged 58 and his wife Quoi Chang aged 50.
The court has given Chang a indefinite hospital order.
Detective Inspector Martin Slevin, from Force CID, led the investigation. Speaking after the court order was imposed, he said: "From a policing point of view, today sees the close of this tragic case but for Chang, his brother and his sister, their agony continues.
"Pin and Quoi Chang lost their lives at the hands of their son who was experiencing a severe bout of mental ill health.
"That day not only saw the senseless loss of life but the devastation of a close and loving family.
"I hope that the end of criminal proceedings will allow the family to continue the long and difficult path to rebuilding their lives in some way."
Jamaican born Douane Brown will spend at least 21 years in jail for the killing.
A man's in hospital after being stabbed in Birmingham.
Ukip leadership candidate Bill Etheridge has withdrawn from the contest and called on rivals to back current deputy leader Paul Nuttall.
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