Do you think that the following "perfect crime" holds to scrutiny anyway or has the following faults?

The perfect crime is the following:

Crime: A mentally impaired boy, Danel Neville, enduring great suffering commits suicide by overdose in a locked and drug-free room. We find the pills and bottle on the floor, but nobody else went near the room and nobody saw him except his mother, who’s arrested for being the only person who could have given the drugs to him.

The pill bottle on the floor, that was the key. He couldn’t have gotten them into his room—past all that security and all those checks and a police officer—in clothes that had no pockets. He could barely walk at all. Had to be his mother, didn’t it?

Solution: There were any pills in that room at all. Easy enough to slip a lethal dose of his own medicine into his food and let it leak toxins into his bloodstream. Especially easy if the culprit happens to be on his lunch break in the kitchen at about the same time as Daniel’s food was being prepared.

The culprit made sure that Daniel Neville was in his room for almost an hour before the culprit walked past, plenty of time for the drugs in his food to have killed him. He punched through the window to open the latch on the inside of his door, even though a few seconds more would have been enough time for the nurse to have arrived with the key. But he had to, because punching through that window was the only way to scatter that bottle of pills into the room, to make a homicide look like a suicide.

There’ll be no way for the police to prove his guilt as he picked up the bottle of pills in the room, which nullifies the fact that his prints are on it.

Faults: Daniel Neville was taking his medication at a daily twenty-five-milligram dose, but he died of an overdose of twohundred-milligram pills. The culprit had to use them of course, because it’s surprisingly hard to kill someone using those kinds of medications. Thing is, the different pills are different colors.