This ease arises from the suicide of appellant Frankie Clark’s fourteen-year-old son K.F. that occurred while K.F. was in the custody of the appellee District of Columbia at the Receiving Home for Children (“Receiving Home”). Following a two-week jury trial, the trial court granted the District’s motion for directed verdict on appellant’s negligence claim. Because appellant failed to prove a violation of the requisite national standard of care, we affirm.
I.
K.F. was a mildly retarded young man who had a long history of behavioral problems, institutionalization and unfulfilled suicide threats. On the morning of January 12, 1993, he was in disciplinary lock-down at the Receiving Home for fighting. 1 K.F. was upset about being in lock-down and requested a hearing to contest his lock-down status. At about 9:30 a.m., a hearing was held where K.F. repeatedly cursed the hearing officer. After the hearing concluded, K.F. told a member of the staff that he was going to kill himself, and tied a sheet around his neck. K.F. also threw a chair into a glass partition which caused the partition to shatter. Following this outburst, K.F. was restrained by Receiving Home personnel and forcibly returned to his room while he continued to threaten to kill himself.
In response to these threats, KF.’s room was swept and stripped of all items except for the bed spring. At this time K.F. was wearing only a pair of boxer shorts. At about 10:00 a.m., an art therapist visited K.F. in his room, and he again threatened to kill himself saying he would eat glass.' The art therapist then placed K.F. on “Greenline” warning suicide monitoring status. The art therapist subsequently discussed the situation with the resident psychiatrist who agreed that Greenline warning status was appropriate.
Under the Suicide Prevention Plan then in effect at the Receiving Home there were three levels of suicide monitoring or “Green-line status”: warning, watch and alert. Greenline warning status was the least restrictive level and was appropriate for residents who had a previous Greenline or psychiatric history but were manifesting no current suicidal ideations or gestures. Greenline warning status required that the resident be kept in a room and observed four times an hour at staggered intervals. The next level, Greenline watch status, was appropriate for residents who had made current suicide threats. Under Greenline watch, the resident was to be kept in the line of sight of a staff member at all times. The third and highest level, Greenline alert, was for residents who had recently made a suicide gesture or attempt. Under Green-line alert, a staff member was required to remain in close physical proximity to the resident and keep the resident in line of sight at all times. K.F. was thus placed on the lowest level of suicide monitoring and was supposed to be kept in his room and *634 subjected to random checks four times an hour.
The Greenline observation form completed for K.F. that day indicates that he was checked at regular fifteen minute intervals from 10:00 a.m. until 12:45 p.m. During this time K.F. was observed kicking the door of his room, eating lunch, tearing up paper plates, and jumping on his bed. At 12:52 p.m. a staff member discovered K.F. hanging by the elastic waistband of his boxer shorts from a bar on the window of his room. K.F. was removed from the bar and taken to the hospital where he died the next day.
Appellant brought this suit under the wrongful death and survival statutes, and argued that the District was negligent because it violated the Suicide Prevention Plan by placing K.F. on Greenline warning instead of Greenline watch status as required by KF.’s suicide threats and gesture. 2 At the close of the plaintiffs case, and again at the close of all the evidence, the District moved for directed verdict on the grounds that the plaintiff had failed to prove the requisite standard of care. The District argued that because the Suicide Prevention Plan was an unpublished internal guideline it could not serve as the standard of care in a negligence action. It also argued that the testimony of appellant’s expert witness was legally insufficient because it was not based on a published national standard of care and consisted merely of his own personal opinion. The trial court rejected these two arguments, but granted the motion for directed verdict on the grounds that the appellant had failed to prove that KF.’s suicide attempt proximately caused his death, and that appellant’s expert, who was the director of the unit regulating juvenile detention facilities in New Jersey, was not professionally qualified to dispute the medical and clinical judgment of the Receiving Home’s psychiatrist that KF. be placed on Greenline warning status. This appeal followed.
II.
Appellant’s primary contention on appeal is that the trial court erred in granting a directed verdict on the above-mentioned grounds. We need not decide whether the trial court erred in ruling on these bases; the directed verdict was correct in any event because, as the District presses on appeal, appellant’s expert failed to provide sufficient testimony that the District violated a national standard of care.
See Sebastian v. District of Columbia,
“The plaintiff in a negligence action bears the burden of proof on three issues: the applicable standard of care, a deviation from that standard by the defendant, and a causal relationship between that deviation and the plaintiff’s injury.”
Messina v. District of Columbia,
In the context of actions against the District by persons in its custodial care, we have been demanding in requiring proof of a national standard of care.
See Moreno, supra,
Here appellant’s expert, Joseph DeJames, recited the facts surrounding KF.’s death and concluded that the employees of the Receiving Home had violated the Suicide Prevention Plan by placing K.F. on Greenline warning rather than Greenline watch. DeJames also asserted that the District violated “the applicable standard of care” by placing K.F. on Greenline warning rather than on Greenline watch. However, Mr. DeJames never testified with any specificity that the standard of care he had in mind was used by other facilities comparable to the Receiving Home or based on some nationally recognized standard.
3
Mr. DeJames’ testimony was similar to that of the experts in
Carmichael
and
Moreno
in that “he did not identify, or even mention in passing, any specific standard or regulation.... [n]or did he make any comparisons to other similar facilities.”
Moreno, supra,
Appellant argues that even if Mr. DeJames’ testimony was insufficient to establish a national standard of care, directed verdict was still improper because there was evidence that the District had violated its own Suicide Prevention Plan by placing K.F. on Greenline warning instead of Greenline
*636
watch status.
4
“To prevail on a negligence
per se
theory, the plaintiff may, in certain circumstances and under specified conditions ... rely on a statute or regulation as proof of the applicable standard of care.”
McNeil Pharm. v. Hawkins,
The Suicide Prevention Plan may well have been admissible as
bearing on the
standard of care, as the internal rules of private corporations generally are.
See
1 J.D. Lee and Barry A. Lindahl, Modern Tort Law § 3.29 (1996) (“Company rules are generally admissible but not conclusive on the question of the standard of care.”); 3 Fowler V. Harper et al., The Law of Torts § 17.3, at 587-88 (2d ed.1996) (same);
cf. Thoma v. Kettler Bros.,
Affirmed. 7
. Appellant also contends that the trial court erred in excluding two of her expert witnesses and allowing one of the District’s witnesses to testify as an expert. We review a trial court’s decision to admit or exclude expert testimony for an abuse of discretion.
District of Columbia v. Anderson,
Notes
. The Receiving Home was a facility for detained youth awaiting trial but also housed children who were adjudicated delinquent.
See In re W.L.,
. Appellant also brought suit for an unrelated assault and battery allegedly perpetrated on K.F. by Maurice White, an employee of the Receiving Home. The jury returned a verdict for White and the District on the assault and battery count, and the trial court denied appellant’s motion for a new trial. Appellant now contends that the trial court erred in denying her motion for new trial as against the weight of the evidence. We review a trial court’s denial of a motion for new trial for abuse of discretion, and are especially deferential when that denial sustains a jury verdict.
Oxendine
v.
Merrell Dow Pharm., Inc.,
. The most that Mr. DeJames did, and then only on cross-examination, was to refer to an American Correctional Association standard with which he was not familiar and did not utilize and to assert that two levels of checks, one fifteen minutes and one constant watch if the juvenile reached a certain unstated level of suicidal behavior, would be consistent with most standards nationally, hut with no indication how such levels are generally defined and applied in practice.
. There was also some evidence that the District violated the Suicide Prevention Plan by monitoring K.F. at regular instead of random intervals and in not providing a suicide-proof room. At oral argument, however, appellant’s counsel indicated that the only theory of liability he intended to rely on was that based upon the allegedly negligent assignment of K.F. to Greenline warning instead of Greenline watch, with its requirement of continual in-line-of-sight observability. In any event, a claim based on the lack of random monitoring or a suicide-proof room would fail for essentially the same reasons as one based on the incorrect monitoring status. Even with respect to such claims, the closest appellant’s expert appears to have come to specificity was to refer to his employment experience in New Jersey, which he said has one of the lowest suicide rates in the nation for confined juveniles.
. Appellant's argument that the Suicide Prevention Plan, embodied the standard of care because it was adopted pursuant to court order in the
Jerry M.
litigation,
see generally District of Columbia v. Jerry M.,
.When asked whether any institution in the United States had a better suicide prevention plan than the District’s, the expert said he did not know. He also indicated that he thought the District exceeded the national standard of care by providing for a full-time physician, full-time psychiatrist and in-house counsel.
