The lyrics I know to "Mr. Snoop and Mr. Peep" are as follows (and if anyone knows where it's from, please let me know!):

When series of killings by murderous villains
Have all the cops perplexed
With relative shrieking and moaning and groaning
And wond'ring who'll be next
When Sherlock Holmes and Philo Vantz (sp?)
Admit they're up a tree
Then Mr. Snoop and Mr. Peep
Will solve the mystery.

While others are sleeping they're snooping and peeping
In stairways and on shelves
With tricky disguises and sneaky surprises
They often fool themselves
So if you wake to find that you've been murdered in your sleep
Send for Mr. Snoop and Mr. Peep!