Detective Sergeant Mark Arnsperger was originally appointed to the Moberly Police Department in January 1993. He served as a patrolman until 1999 when he was appointed to the rank of Detective.
In 1999 Detective Sergeant Arnsperger was one of five officers wounded during a shoot-out in Huntsville, Missouri involving two escaped prisoners from the State of Georgia. He received the Medal of Valor for his actions during the incident.
In 2002 he left Moberly Police Department and went to work for the Division of Liquor Control as an Agent. He served in the capacity for ten months until cutbacks at the State of Missouri eliminated the position. In the 2003 Detective Arnsperger was re-employed at the Moberly Police Department once again as Detective.
In December 2006 he was promoted to Corporal and reassigned to the A and C platoons as Assistant Supervisor. In April 2007 he was promoted to Sergeant and became the Watch Commander for A Platoon. In April 2008 he was reassigned as Detective Sergeant and is now the current supervisor of the Criminal Investigative Unit for the Moberly Police Department.
Detective Sergeant Arnsperger has received numerous hours of training over the years including homicide, interview and interrogation, narcotics and crime scene investigation. He is also a forensic interviewer for the Moberly Police Department and assists interviewing young children who have been a victim of physical and sexual abuse. He is also an Investigator for the Mid-Missouri Major Case Squad. Detective Sergeant Arnsperger has also served on the Hostage Rescue Team, the Pistol Team and as a Field Training Officer for many years.