updated 10/24/2011 AT 10:00 AM ET
•originally published 10/24/2011 AT 10:45 AM ET
Was the man seen walking post-midnight near the home of missing 11-month-old Lisa Irwin carrying a baby that did not belong to him?
Police won’t say, and Lisa’s parents don’t know. But that report, along with a second report of a man carrying a baby a short distance away around 4 a.m. on Oct. 4 – the time that Lisa was reported missing from her crib – is “unbelievably substantial,” says the attorney for parents Deborah Bradley, 25, and Jeremy Irwin, 29.
“When you have two independent witnesses making that same observation a mile apart,” attorney Joe Tacopina tells PEOPLE, “that’s something that cannot be discounted.”