A Kansas psychiatrist was stabbed to death 165 times, beaten and possibly run over with a car outside his clinic in Wichita last month, according to a newly released arrest affidavit for a patient charged in the grisly attack.

Umar Dutt, 21, has been charged with first-degree murder in the September 13 killing of Dr Achutha Reddy, 57, at his Holistic Psychiatry Services clinic. He is being held on $1million bail.

A female clinic employee reported hearing Reddy calling for help and then seeing Dutt stabbing the psychiatrist, according to the affidavit written by a Wichita police detective.

Scroll down for video

Umar Dutt (left), 21, has been charged with first-degree murder in the September 13 killing of Dr Achutha Reddy (right), 57

Reddy was found stabbed 165 times with a pocket knife and possibly run over outside the Holistic Psychiatric Services clinic in Wichita, Kansas

The employee was able to briefly separate the two. Reddy then ran out the back of the clinic with Dutt following him, according to the affidavit, which was released Thursday.

Reddy also suffered 'blunt force trauma' and may have been run over by a vehicle, the affidavit states.

The doctor who performed the autopsy on Reddy also identified 'approximately 165 sharp force trauma injuries.'

Investigators haven't released a possible motive in the attack.

Police said the suspect and Reddy had been seen entering the clinic together earlier in the day. The suspect left and later returned, and the two entered an office together.

The first call about the stabbing came at 7.20pm, leading to the discovery of Dr Reddy's body in an alley.

Police said the suspect and Reddy had been seen entering the clinic together earlier in the day

About 20 minutes later, a Wichita Country Club security guard spotted a man khaki shorts 'saturated in blood,' according to the affidavit, sitting in a gold Toyota Camry registered to Dutt's father and called 911.

Dutt was taken to a hospital, where medical staff determined he wasn't physically injured.

Authorities spotted a baseball bat in the back seat of the car, a pocket knife and a shirt soaked with blood, and more blood was found on the tire tread, the affidavit says.

Defense attorney Kurt Kerns told The Wichita Eagle that 'more evidence will be coming to light' and "everybody is entitled to be presumed innocent.'

An attorney for Dutt's family previously released a statement offering their condolences to the doctor's family.

Dutt, Reddy's patient, was later found sitting in a car, dressed in khaki shorts 'saturated in blood,' according to an affidavit. No motive has been released

Raj and Azra Dutt said their family would continue to suffer 'the terrible toll and consequences of mental illness.'

Struggling to contain her grief after Reddy's killing, his widow Beena said that she doesn't know why he would want to kill her husband. She said Reddy was adored by his family and his patients, and that he was 'a very good man.'

'He was so devoted - so devoted to his patients, so devoted to his family,' she said. 'He was truly a wonderful man, a wonderful physician.'

Reddy leaves behind his wife and their three children.

Holistic Psychiatric Services says on its website that it 'serves the needs of your mind, spirit, and body.' Its psychiatric medication evaluation and treatment includes yoga and meditation.

Brenda Trammel, the outpatient clinician at Holistic Psychiatry Services, read a statement calling Reddy 'an amazing, compassionate man that was kind and loving to anyone he met.

He had a gift of knowing what each and every one of us needed and gave it freely. He would often tell me you have to live life to the fullest and this is how he lived his life.'

She said Reddy thought of himself as 'our father' and believed it was his job to guide them to do well in their lives.