Tirop was found murdered on October 13 in his bedroom.
Keiyo sub-county deputy chief intelligence officer Andolo Munga confirmed the discovery of the CCTV footage, saying Ibrahim Rotich appeared in the photographs.
Officials responsible for the case said the photos were important in the case.
They are also investigating the information given to the murder suspect before he escaped following the death of the athlete.
The Eldoret High Court ordered Ibrahim Rotich to undergo a psychiatric examination at Moi Special Training and Medical Hospital before being charged.
The deputy registrar of the Eldoret High Court, Diana Milimo, ordered Rotich to be arraigned on November 16 for the murder of the athlete.
State Counsel David Fedha, said the suspect should undergo a psychiatric examination before being charged, a statement which was backed by Ngige Mbugua who is the defendant's lawyer.

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