Anand, one of the three accused in the case, was arrested after he was discharged from KMC Hospital where he had been admitted following his attempt to hang himself on June 27, Udupi Superintendent of Police Dr Boralingaiah said.
He would be produced before a district court tomorrow, he said.
Anand and his accomplice Yogesh Shantappa Poojary were undergoing treatment at the hospital after their alleged failed suicide bid fearing arrest, he told PTI.
Another accused, Hariprasad, had been arrested and remanded to five days police custody on June 28.
The medical student was kidnapped from the Manipal University in an auto-rickshaw and allegedly gang-raped by the three men on late June 20 night. The victim is recuperating in a hospital.