The avatar kept staying in the inn after he made a mess of the city last night. He only came out when the investigators were checking the entire area and searching every establishment in detail.
He was also checked, but no one found out that he was the culprit. It was already within his expectations, as there was no way those people could identify him based on his appearance or energy.
Even if someone realized he was using a disguise technique and asked to see his true face, they still would not know whether he was one of the killers. After all, none of them had ever seen his real face. And when they checked his energy, there would be no trace of Tarius' energy within his body.
In his mind, his method of hiding was perfect.
