Bin lorry driver, Martyn Thompson, who tipped a bin in the area at 4.19am, earlier told the inquest in Ipswich that he had checked inside the bin before tipping it, and that nobody was inside it.
He also said he had seen a man in light-coloured trousers and a pink shirt standing in the area and using a mobile phone.
Waste collection driver says he checked and Corrie McKeague was not in bin
Lawyer Dr Anton van Dellen, asking questions on behalf of Mr McKeague's father, Martin McKeague, asked Chief Superintendent Marina Ericson "if it was the police view" that the man seen by Mr Thompson in the service area "was Corrie".
"No," said Ch Supt Ericson, who became senior investigating officer from November 2017.
Dr Van Dellen said that a man, wearing a yellow top, blue hoody and dark trousers, was seen on CCTV using his phone by the service area before walking in, and he suggested this could have been the man whom Mr Thompson saw.
Corrie McKeagueCredit: Suffolk Police
The inquest heard that the man in the blue hoodie was traced by police and spoken to.
Dr Van Dellen said Mr Thompson was informed on September 29 by an operative at the Biffa depot in Bury St Edmunds that police wanted to speak to him.
He said Mr Thompson gave his initial account to the police later that day.
He said that Mr Thompson, in his initial account, described seeing a "smartly-dressed, white male in light coloured clothing with light-coloured trousers, holding a mobile phone, he appeared to be 18 to 20 years old".
He later gave his first witness statement, on October 5 2016.
In it, Mr Thompson described the man as "18 to 22 years old, smartly-dressed" with a "pink, light-coloured shirt which he believed to be long-sleeved", adding that he had "light brown or blonde-coloured hair that was short at the sides but longer at the top", Dr Van Dellen said.
Ch Supt Ericson agreed with the lawyer that this was "more detail, more specific than his first account".
She agreed with him that a possible explanation was that, between his initial statement on September 29 and his first witness statement on October 5, Mr Thompson "has been exposed to newspaper coverage or a media appeal for Corrie with that description and his evidence has become coloured, even if subconsciously".
Ch Supt Ericson agreed with Dr Van Dellen that a second possible explanation was that Mr Thompson "has effectively deliberately described (the man) with that description to place, potentially, Corrie away from the bin and superimpose Corrie's description on (the man)".
Police say they don't believe man bin lorry driver saw was Corrie McKeague | ITV News