Parents of a teenager accused of killing a Perth nurse in an Edgewater park have said in court they have no control over their son.

Their 17-year-old boy has been charged with manslaughter, accused of hitting a Perth nurse with an electric dirtbike while she walked in an Edgewater park.

Today it was revealed police tried to stop the teenager with lights and sirens just five minutes before the fatal collision.

“Anything like this is just tragic,” Detective Sergeant Paul Giuffre told 6PR.

“The poor family and friends and obviously a local nurse as well. Yeah, my heart goes out to him. It’s just, it’s horrible.”

The teen’s parents supported him from the back of Perth Children’s Court as he prepares to spend his fourth night behind bars.

The court heard that the 17-year-old has ADHD and autism and is on an NDIS plan.

The prosecutor said the boy had stopped taking his medication, instead self-medicating with prescribed cannabis.

Prosecutors also claimed a backpack was found at the scene with the drug and that early investigations show messaging apps could indicate he was dealing.

The court heard that the boy’s parents had separated and the teenager had stopped attending school, with the state saying his father had “absolutely no control over his behaviour”.

The teen’s lawyer told the court the boy was not coping well at Banksia Hill.

The 17-year-old is said to be struggling with his obsessive compulsive disorder, cleaning and mopping floors at the detention centre.

His lawyer will be pushing for bail at his next court date in a week.