my summary and translation:
The Georgian suspect denies any involvement. Forensics results are not yet in. The Georgian is being interrogated by both the homicide and robbery units of the police. There are many similarities in the modus operandi between this case and a prior case in the same region in March*.
*I've seen other Greek media reports that the police have DNA for this suspect in regards to the prior case, but he denies any involvement in that case, even though the police have the DNA evidence. Thus police are skeptical of his denials in this case and suspect he may be involved in this case, and even if he's not involved directly, that at a minimum he may know persons involved in this case.