After a predictable outcry, police arrested him the next day. The 67-year-old tried to wave them off with a copy of a release order, which he claimed was justified by President Gloria Macapagal-Arroyo's grant of executive clemency in April this year, when she reduced his two life sentences to a 16-year term.
Jalosjos is now behind bars again - but his case provides a startling insight into a Philippine judicial and political system that never ceases to amaze.
Jalosjos' incarceration has already led to the sacking of three jail wardens.
The first was sacked for allowing the convict to host a party in the jail, with Jalosjos supplying a roast pig, beer and raffle prizes. The party also featured a pre-teen dancing girl.
A second jail warden was sacked after a fellow prisoner acting as Jalosjos' bodyguard was found in possession of a gun.
The third was sacked on Wednesday for signing Jalosjos' release papers, even though the Bureau of Corrections chief Ricardo Dipat said the release had been approved by presidential executive secretary Eduardo Ermita.
Critics of President Arroyo suggest she still wants to have the powerful Jalosjos freed, and was prevented from doing so this time only by the public outrage. But Arroyo supporters say the fact that Jalosjos is back in jail is proof of where her loyalties lie.
Presidential legal counsel Sergio Apostol said Mrs Arroyo 'has seen that there is a public clamour to deny him clemency, that this is not the right time to release him'.
What remains beyond question is that Jalosjos has shown not a trace of remorse for his crimes - raping an 11-year-old girl twice and six counts of lascivious acts. The 1997 trial was a sensational affair, which came only after a 23-day manhunt.
The victim had been adopted by a man named Simplicio Delantar, who had sold her for sex to wealthy men since she was five.
She testified that Jalosjos had promised to make her a TV star and gave her lots of money to buy clothes and candy. She described her encounter with Jalosjos in the Ritz Tower in Makati City, where she was instructed by Delantar to call the congressman 'daddy'.
Despite the girl's damning testimony, Jalosjos continued to enjoy bipartisan support, even after his conviction. Lawmakers refused to expel him from Congress on the grounds that he could still appeal before the Supreme Court.
He did appeal, saying he was 'a victim ... of an 11-year-old experienced sex worker'. The Supreme Court rejected his appeal in 2002.
Jalosjos enjoyed the support of at least two presidents. During the trial, Joseph Estrada once confronted prosecutors and demanded to know: 'Why are you persecuting my friend?' Estrada told them their efforts were useless because he would simply give Jalosjos a presidential pardon.
Mrs Arroyo paid Jalosjos a post-midnight visit in his jail cell in 1997, when she was considering a run for the presidency.
Jalosjos' brother and sister later joined Mrs Arroyo's political party, Kampi, and helped deliver her victory in the 2004 presidential polls.
Then in 2005, Mrs Arroyo raised the possibility of releasing Jalosjos, in exchange for his legislative allies approving urgent tax measures.
Justice Secretary Raul Gonzalez said there was 'no question' Jalosjos had well-placed friends. In 1998, Mr Gonzalez himself was among legislators who petitioned for Jalosjos to be allowed to attend legislative sessions after his conviction.
But Mr Gonzalez said he had no choice last week but to order Jalosjos back to jail - and stay there until at least 2009. 'I really have nothing against Mr Jalosjos personally ... I'm just following the policy of the president,' Mr Gonzalez explained.
Reli German, a former colleague of Jalosjos in the entertainment and advertising industry, speculated that the Arroyo government now had no choice but to keep a valued political ally in jail. 'I don't think they can afford the backlash,' said Mr German, who is now a presidential palace consultant.
He tried to explain why Jalosjos continues to have many backers: 'He's charming, charitable, he's not a stingy person. He's a soft touch - anybody can walk up to him, give him a sad story and he'll do something about it.'
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