This educational guide is based on the linked primary sources. It is not a Court publication, is not affiliated with the Court, and is not legal advice.
In brief
Overview
According to Todd Kim, probable cause is a practical standard that accounts for the practical limitations officers face when making arrest decisions.
Respondents contend that the officers were plainly incompetent in disregarding.
Petitioners argue that the competing motions for summary judgment were not properly raised and that the factual background was set out in their brief.
Background and question before the Court
Justice Ginsburg asked for clarification of the other charges in the case, specifically disorderly conduct and negligent supervision.
According to Justice Breyer, justice Breyer questioned whether an arrest is justified when a policeman enters a house and discovers a party where the inviter lacked authority.
According to Justice Alito, justice Alito inquired about what additional evidence could have been sought.
What each side argues
Petitioners
Petitioners argue that the competing motions for summary judgment were not properly raised and that the factual background was set out in their brief.
Respondents
Respondents contend that the officers were plainly incompetent in disregarding.
What happened at oral argument
Justice Ginsburg asked for clarification of the other charges in the case, specifically disorderly conduct and negligent supervision.
According to Justice Breyer, justice Breyer questioned whether an arrest is justified when a policeman enters a house and discovers a party where the inviter lacked authority.
According to Justice Alito, justice Alito inquired about what additional evidence could have been sought.
What the Court decided
Why it matters
According to Todd Kim, the discussion of probable cause as a practical standard highlights the need for courts to account for the real‑world constraints faced by police officers.
According to Robert A. Parker, an amicus brief argues that lower courts made fundamental errors by isolating facts when analyzing probable cause, suggesting that the Supreme Court may need to clarify the proper analytical approach.
Terms to know
No glossary terms are available for this guide.
Primary sources
Read the source materials on the official site or open the immutable repository copy used for this guide.
- 05134913032eb1da0eec-r1-648838ec3f347864.pdforal argument transcript
Guide generated September 25, 2026. Automated validation accepted this version.