LA CROSSE, Wis. -

The City of La Crosse released the reasons for firing Assistant City Attorney Peter Kisken, whose termination was effective April 12, 2013.

Kisken and Community Development Administrator Liana Escott were escorted from city hall on paid administrative leave on May 25, 2012. Escott eventually resigned her position in January.

Following a "thorough investigation" Kisken was let go for "engaging in a personal and sexual relationship at work while using city resources, including inappropriate emails," in addition to other things, City of La Crosse Human Resources Director Wendy Oestrich said in a news release.

Oestrich said some of the other reasons Kisken was fired was because of insubordination; engaging in disparaging and derogatory emails at work using city resources; breaching confidentiality; abuse of authority; wasting city time and resources for non-city matters during paid work time; and failing to protect his city computer password, which enabled a co-worker to access confidential legal department records.

Oestrich said the city "strongly denies any allegations by Mr. Kisken of retaliation and discrimination. This is simply a personnel matter involving an employee who engaged in misconduct and had deficient work performance. Mr. Kisken's actions demanded that the city take appropriate action, which was termination."