M. B. v. City and County of San Francisco, et al.

District Court, N.D. California·Decided June 29, 2026·No. 3:24-cv-00301·Unknown

Opinion

UNITED STATES DISTRICT COURT NORTHERN DISTRICT OF CALIFORNIA

M. B., Case No. 24-cv-00301-RFL

Plaintiff, ORDER RE MOTIONS FOR v. SUMMARY JUDGMENT

CITY AND COUNTY OF SAN Re: Dkt. Nos. 110, 113 FRANCISCO, et al., Defendants.

I. INTRODUCTION Plaintiff M.B., a twenty-year-old formerly under the jurisdiction of the San Francisco Juvenile Court and confined in San Francisco Juvenile Hall (“SFJH”), filed suit against Defendants City and County of San Francisco, Bryan Thomasson, and other employees of the City, County, and the San Francisco Juvenile Probation Department. M.B. alleges that from December 21, 2022, to December 24, 2022, Defendants held him in solitary confinement for a total of three days in violation of his rights under both federal and state law. (Dkt. No. 18.) Both parties move for summary judgment. (Dkt. Nos. 110, 113.) For the reasons that follow, M.B.’s motion is DENIED, and Defendants’ motion is GRANTED IN PART AND DENIED IN PART. II. BACKGROUND A. Undisputed Facts M.B. was transferred to SFJH from San Mateo Juvenile Hall in Spring 2022, having previously been adjudicated delinquent and sentenced to four years of confinement in 2020. (Dkt. No. 113-3 (“M.B. Dep.”) at 69:12–76:3.)1 On December 21, 2022, Defendants received an anonymous tip that M.B. was in possession of a cell phone, pills, a laptop, and other items that constituted major contraband. (Dkt. No. 113-6 (“Johnson Dep.”) at 30:7–31:12; see also Dkt. No. 113-4 (“Thomasson Dep.”) at 47:9–25.) At around 1:30pm, Defendants Thomasson and SFJH Deputy Probation Officer Nigel Hicks searched M.B.’s room and found a cell phone, adapters, a portable charger, and several charging cords. (Thomasson Dep. at 41:7-43:1.) This triggered a unit-wide search of every detainee’s room and all common areas. (Id. at 59:2–11.) M.B. was moved to a different room in his unit and placed in room confinement beginning at 3:00pm on December 21. (Id. at 40:4–6, 55:7–56:13.) While in room confinement, M.B. was provided with about an hour of recreation time, during which he had access to shower facilities, the telephone, visitation, and the gym. (See M.B. Dep. at 233:20–235:22; 262:1–25; Johnson Dep. at 67:21–71:14.) He remained in room confinement until December 24, 2022, at around 11:00am. (Thomasson Dep. at 120:1–21; see also Dkt. No. 113-20 at 12.) M.B. submitted two grievances concerning this confinement. First, during his confinement, M.B. filed a grievance stating that he was beginning to feel depressed and experience mental health issues because he had been in room confinement for days. (Dkt. No. 18 at 90.) He admitted he had contraband in his room but asserted that he was “not a threat to [himself] or others,” there was no reason for him to be “lock[ed] down like a[n] animal,” and he believed his confinement was a violation of his rights. (Id. at 89.) In a “[g]rievance attachment,” M.B. “restate[d] that [his] rights [had been] violated” by his room confinement, explaining that he was “unlawfully held in solitary confinement,” “held in isolation against [his] will,” and “denied [his] rights to programming and exercise.” (Id. at 92.) He indicated that he was seeking both damages for the harms he experienced and “a change in policies and practices so that [SFJH] do[es] not violate [his] rights or the rights of other youth in the future.” (Id.) Second, in June 2023, M.B. submitted a tort claim to the City and County. (Dkt. No. 113-10.) The claim

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M. B. v. City and County of San Francisco, et al., (N.D. Cal. 2026).

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