Maybe put the pills in a different place?
Care facilities are very sensitive about their reputation. Loud complaints occasion rumors and reactions. In earleir times, DW worked in a nursing home. When a watch belonging to an aging resident went missing, the upset to patients and patients' families (plural) become such a negative that some threatened to leave. Never mind that the watch turned up where resident had hidden it (and forgot)... the suspicion and effect on morale was long lasting. Mentioning the loss to a management member should be enough, but turning this into a major incident could be counterproductive.
Care facilities are continually under fire. Being responsible is one thing, but we see some families constantly carping about isolated incidents and can see some negative results... not just for the facility, but for other patients.
We're very close to many members living in the apartments, the assisted care, and the nursing home, and we're there enough to see the kind of food, care and personal attention that they receive in a day in, day out basis. The employees are a team, and totally dedicated, and the turnover is very limited. All of this care gets turned upside down, when a visiting family member becomes upset and runs through the halls shouting for the manager, when his/her mom doesn't get assistance within 60 seconds of pressing the bedside call button.
A bit more... off topic...
24/7 care is challenging. One on one care basically would require three full time employees for one resident person. We feel very fortunate to live in a house in our CCRC. If and when it becomes necessary for us to move into one of the facilities, we feel comfortable with what we've seen. Taking the time to plan ahead for this, may be as important a selecting ones retirement home.