As a result of an incident in a grocery store, Larry E. Estes was arrested. Estes filed this action pursuant to 42 U.S.C. § 1983 alleging that he was arrested without probable cause and that excessive force was used in arresting him. Defendant police officer Aaron Moore counterclaimed. A trial was held on the issues, and the jury returned a verdict against Estes on his § 1983 claims and returned a verdict in favor of Moore on the counterclaim awarding $1.00 in damages. The district court 1 denied Estes’s motion for new trial. Estes appeals.
I.
After observing Estes fall to the floor in a grocery store, a store employee called 911. Estes asserts that he had suffered an epileptic seizure. Firefighters Captain George Amen, Marvin Bauer, and John Hibberd
Estes argues that the district court erred in denying his motion for new trial. Estes also asserts that the district court abused its discretion in limiting the testimony of Estes’s expert witness and excluding evidence of Moore’s alleged negligence. We affirm.
II.
Estes argues that a new trial should have been granted because the evidence did not support findings that probable cause for the arrest existed, that Moore did not use excessive force in effectuating the arrest, and that Estes used unlawful force against Moore. The decision whether to grant or deny a motion for a new trial rests in the sound discretion of the trial court.
Morgan v. City of Marmaduke, Ark,
First, wé disagree with Estes’s argument that probable cause did not exist. When Moore stopped him by grabbing his arm, the stop was merely investigatory and not an arrest which requires probable cause.
See Terry v. Ohio,
III.
The district court sustained an objection to allowing Estes’s expert to testify as to whether probable cause for the arrest existed. Estes argues that the district court could not exclude the expert testimony just because it went to the ultimate issue in the case.
See
Fed.R.Evid. 704(a). Expert opinion testimony is only admissible if it “assists the trier of fact to understand the evidence or determine a fact in issue.”
See
Fed.R.Evid. 702. While the existence of probable cause is a mixed question of law and fact, the ultimate conclusion is a question of law.
United States v. Campbell,
IV.
For the reasons stated above, we affirm the judgment of the district court.
Notes
. The Honorable Warren K. Urbom, Senior United States District Judge for the District of Nebraska.
