Matthew MacIver, 23, was found guilty of multiple counts of hindering police in Hamilton in July last year and May this year.

Police prosecutor Senior Constable Paul Harris said MacIver was arrested for being drunk in Hamilton last July after he was refused entry to nightclubs.

He had lashed out at police, verbally abused them and spat in the face of one officer.

When placed in a police cell, he had urinated on the floor, activated the duress alarm and yelled abuse at police.

MacIver had excreted on the cell floor and later banged his forehead on the cell door until his forehead bled, Senior Constable Harris said.

When ambulance officers were called, they had difficulty treating MacIver because of his behaviour and he was taken to hospital where he continued to be aggressive.

Senior Constable Harris said MacIver was involved in another incident on May 17 this year, when police attended a call in Hamilton about three men fighting and smashing bottles.

They found MacIver hiding in a garden and he was apprehended after a chase.

MacIver was injured but made threats to ambulance officers and police, threatening to kill police and harm their families, who were known to MacIver.

Xavier Farrelly, for MacIver, said his client had not followed up on his threats and accepted that he had anger issues.

MacIver was angry with police because he believed they had not properly investigated an incident in which he had been hit by a motor vehicle, Mr Farrelly said.

Magistrate Ann McGarvie said MacIver had an alcohol problem as well as an anger problem because every time he had assaulted police, he had been drunk.