Teachers short question

If one sample from a known suspect that contains a sequence of nucleotides that reads:

A-T-G-C- A-T-T-A,

and then the criminalist compares it to a sample from the crime scene that reads:

A-T-G-C- T-A- T-A ,

What would be your conclusion… should the police exclude the suspect from the scene of the crime, or go escort him into the interrogation room? Explain.