An 18-year-old Berwick man and a 17-year-old Patterson Lakes boy were taken into custody on Saturday night.

It comes after Euan Delly, 18, faced court on a string of charges on Saturday over his alleged role in a crime spree through the city's eastern suburbs that left a motorcyclist dead and home owners terrified.

The Seaford teenager is accused of committing 17 offences over a four-day period, netting three stolen vehicles and nearly $20,000 worth of stolen jewellery and belongings.

Mr Delly has also been accused of attacking a police officer while in custody.

Police also charged the teenager with stealing the BMW X5 that struck motorcyclist Keith Stevens as the sheet metal worker was heading home from his job last week.

Family and friends have paid tribute to the Mitcham man, who had a son and partner in Australia after moving from his native Scotland.

Mr Delly has not been charged over the fatal crash, but it's alleged he was among four people in the stolen BMW when it hit Mr Stevens, dragging him 85 metres before his bike caught fire.

A 17-year-old boy has been charged, accused of driving the stolen car, and will face a children's court at a later date.

The car was found dumped on the EastLink following the crash.

But the extent of the group's alleged offending before and after the fatal hit-run became clearer in court on Saturday after criminal charges were filed.

Police allege that Mr Delly's crime spree began on November 1, when he stole $92 worth of petrol, and continued last week across six suburbs:

November 7 and 8:

• Armadale: trespassing with intent to steal
• Caulfield North: trespassing with intent to steal, stealing $10,000 worth of jewellery, wallets, watches, phones

November 8:

• Toorak: trespassing with intent to steal (twice), stole $4000 worth of belongings
• Mitcham: stole a BMW X5 station wagon
• Wantirna South: stole a Toyota Camry sedan, trespassed with intent to steal, attempted a home invasion

November 9:

• Doncaster East: trespassed with intent to steal, stole $5000 worth of belongings (jewellery, car keys) and a VW Golf.

The teenager was arrested on Friday, but then allegedly bashed a police officer while he was being interviewed at a police station, court documents reveal.

His out-of-sessions hearing on Friday night was closed to the public due to security concerns.

Mr Delly did not apply for bail during his brief appearance in the Melbourne Magistrates Court on Saturday, where he was flanked by two security guards.

Defence lawyer James Loftus said his client was an Indigenous youth who had previously been prescribed medication for a drug-induced psychosis.

Magistrate Ross Betts remanded him into custody at a youth justice centre to appear in court via video link again on Tuesday.

With Nino Bucci, Anna Prytz, AAP