Student's Lock-Throwing Found to Be ADHD Manifestation, Despite District's Denial

A 16-year-old student with ADHD threw a combination lock at school, seriously injuring another student. The district concluded the behavior was unrelated to his disability and moved to expel him. The ALJ reversed the district's manifestation determination, finding the lock-throwing was directly and substantially related to Student's ADHD-driven impulsivity and attention-seeking, and ordered Student reinstated and a new functional behavior assessment conducted. The parent did not prevail on claims of predetermination or IEP implementation failure.

What Happened

Student was a 16-year-old sophomore eligible for special education under the category of Other Health Impairment due to ADHD. His IEP included special day classes, a social/emotional goal, and a behavior intervention plan (BIP) targeting impulsive, attention-seeking behaviors in the classroom — things like blurting out, making disruptive noises, and getting out of his seat. On March 8, 2017, Student found a combination lock on the ground near the lunch area. Egged on by peers offering him money and recording with their phones, Student threw the lock toward a distant trashcan, struck two students, and seriously injured one. Student left the area quickly, initially lied to police about what happened, and later admitted in a written statement that he knew it was a bad idea. Within days, the district held a manifestation determination review (MDR) meeting to decide whether the behavior was related to his disability — and concluded it was not, paving the way for expulsion proceedings.

Parent immediately challenged the district's MDR outcome through an expedited due process hearing. Parent argued that Student's impulsivity and need for peer attention — core features of his ADHD — directly caused the lock-throwing incident. Parent also alleged that the district had denied her meaningful participation in the MDR meeting, had predetermined its outcome, and had failed to implement Student's BIP, which also caused the behavior. Student's expert, a board-certified behavior analyst who had been working directly with Student since shortly after the incident, provided detailed testimony about Student's impulsivity and difficulty distinguishing safe from unsafe behavior across settings.

What the ALJ Found

The district was wrong about the manifestation determination. The ALJ found that Student's lock-throwing was directly and substantially related to his ADHD. While Student had average cognitive ability and could generally tell right from wrong, the evidence showed he had a specific deficit in evaluating whether behaviors were safe or unsafe — a distinct skill tied to his impulsivity. Student's own cognitive testing showed weaknesses in executive planning, sustained attention, and visual-perceptual skills, helping explain why he could fear consequences yet still fail to recognize the danger of throwing a heavy lock across a crowded area. The ALJ credited the testimony of Student's expert over the district's experts, noting he had spent far more time directly observing and working with Student.

The ALJ also rejected the district's argument that the behavior was planned rather than impulsive. District experts claimed the multi-step nature of the incident (kicking the lock, apologizing, then throwing it) showed deliberate planning. The ALJ found this unpersuasive — Student picked up the lock and threw it within 5–10 minutes of finding it, and his impulsivity manifested precisely in his inability to evaluate the consequences of a seemingly "fun" peer-attention moment.

However, the parent did not win on every issue. The ALJ found that Mother and her advocate did meaningfully participate in the MDR meeting — they attended, spoke, shared documents, and expressed disagreement, even if the district ultimately disagreed with them. The ALJ also found that the district's administrator's unfortunate choice of words ("I predetermined, yes, that the IEP was implemented correctly") was frustration talking, not actual evidence of predetermination. Finally, the ALJ found that even if the district had imperfectly implemented the BIP, that failure did not directly cause the lock-throwing, because the BIP only addressed classroom behaviors — not impulsive behavior in unstructured settings like lunch.

What Was Ordered

The district's manifestation determination was reversed. The lock-throwing incident was found to be a manifestation of Student's ADHD disability.
Student was ordered reinstated at Martin Luther King High School immediately upon the date of the order.
The district was ordered to conduct a functional behavior assessment (FBA), beginning no later than May 15, 2017 (Parent had already consented to one), and to convene an IEP meeting after the FBA to update the behavior intervention plan accordingly.
Student's requests for academic and social-emotional assessments were denied as outside the scope of the expedited hearing.
Student's request to transfer to a different school (Ramona High School) was denied — the ALJ had no basis to evaluate that placement without a full IEP process.

Why This Matters for Parents

A student can know "right from wrong" and still have a manifestation. Districts often argue that because a student understood the rules or feared consequences, the behavior was a "choice" and not disability-related. This case shows that impulsivity can interfere with a student's ability to evaluate safety even when they have average intelligence. The two concepts are legally and clinically distinct.
Get an outside expert who has actually worked with your child. The ALJ gave significantly more weight to Student's expert because he had spent hours directly observing and intervening with Student, compared to district experts who had not spent any time with him. If you disagree with a district's MDR conclusion, a qualified behavior analyst who knows your child can make a critical difference.
Your BIP's scope matters — gaps can hurt you at an MDR. The district's BIP here only addressed classroom behaviors. Because the incident happened outside the classroom, the ALJ found that even poor BIP implementation wouldn't have directly caused the behavior. If your child has impulsivity or safety-judgment issues in all settings, make sure the BIP addresses behavior in unstructured environments, not just in class.
Attending and speaking at an MDR meeting counts as "meaningful participation" — even if the district ignores your documents. The parent brought written materials that district staff didn't read. That was frustrating, but it didn't rise to a legal violation because she was still heard. If you believe the district is not genuinely considering your input, document your disagreement in writing and request that your materials be made part of the record.

What Happened

What the ALJ Found

What Was Ordered

The district's manifestation determination was reversed. The lock-throwing incident was found to be a manifestation of Student's ADHD disability.
Student was ordered reinstated at Martin Luther King High School immediately upon the date of the order.
The district was ordered to conduct a functional behavior assessment (FBA), beginning no later than May 15, 2017 (Parent had already consented to one), and to convene an IEP meeting after the FBA to update the behavior intervention plan accordingly.
Student's requests for academic and social-emotional assessments were denied as outside the scope of the expedited hearing.
Student's request to transfer to a different school (Ramona High School) was denied — the ALJ had no basis to evaluate that placement without a full IEP process.

Why This Matters for Parents

A student can know "right from wrong" and still have a manifestation. Districts often argue that because a student understood the rules or feared consequences, the behavior was a "choice" and not disability-related. This case shows that impulsivity can interfere with a student's ability to evaluate safety even when they have average intelligence. The two concepts are legally and clinically distinct.
Get an outside expert who has actually worked with your child. The ALJ gave significantly more weight to Student's expert because he had spent hours directly observing and intervening with Student, compared to district experts who had not spent any time with him. If you disagree with a district's MDR conclusion, a qualified behavior analyst who knows your child can make a critical difference.
Your BIP's scope matters — gaps can hurt you at an MDR. The district's BIP here only addressed classroom behaviors. Because the incident happened outside the classroom, the ALJ found that even poor BIP implementation wouldn't have directly caused the behavior. If your child has impulsivity or safety-judgment issues in all settings, make sure the BIP addresses behavior in unstructured environments, not just in class.
Attending and speaking at an MDR meeting counts as "meaningful participation" — even if the district ignores your documents. The parent brought written materials that district staff didn't read. That was frustrating, but it didn't rise to a legal violation because she was still heard. If you believe the district is not genuinely considering your input, document your disagreement in writing and request that your materials be made part of the record.