He was having lunch in his car parked at the top of McCaffrey Rise when he saw a man acting suspicious on the street about 11.30am.
The tradie returned to work, but then recalled to police how he noticed Mrs Blackwood's black SUV return home soon after.
She reportedly opened the garage door and parked the car inside, before going to a wheelie bin in the driveway, and going inside.
The next glance down the street from the young tradesman saw the suspicious man "high tailing it out of the court" and turning left onto Balmoral Way, towards Eagle Drive.
He said the man appeared to be carrying something under his arm.
http://www.heraldsun.com.au/news/la...-kylie-blackwood/story-fni0fee2-1226690738195